Fix code coverage collection.

[UebelAndre]

This change fixes code coverage. Some notable findings as of Bazel 6.2.1.

• _collect_cc_coverage and _lcov_merger are magic attributes that enable the coverage behavior folks might be familiar with in C++ and other native rules.
• Coverage should not be written to COVERAGE_OUTPUT_FILE in _collect_cc_coverage tools. This value appears to only be intended for _lcov_merger tools. Instead, write to COVERAGE_DIR.
• lcov outputs are expected to have the .dat extension.

Additionally this bumps the min tested version to avoid the following error:

(17:44:41) ERROR: /workdir/test/unit/win_interface_library/BUILD.bazel:4:42: Reporting failed target //test/unit/win_interface_library:win_interface_library_test located at /workdir/test/unit/win_interface_library/BUILD.bazel:4:42 failed: Can't build this. This target is incompatible. Please file a bug upstream. caused by //test/unit/win_interface_library:win_interface_library_test

[UebelAndre]

I'm seeing an odd failure on RBE builds. @scentini @meteorcloudy would either of you be able to take a look?
https://buildkite.com/bazel/rules-rust-rustlang/builds/8715#0188aaec-43c1-4ad1-a9fe-62cdbf7d03e3

(14:48:13) FAIL: //test:hello_lib_rule_test (see /var/lib/buildkite-agent/.cache/bazel/_bazel_buildkite-agent/ec321eb2cc2d0f8f91b676b6d4c66c29/execroot/rules_rust/bazel-out/k8-fastbuild/testlogs/test/hello_lib_rule_test/test.log)
(14:48:13) FAIL: //test/rust:hello_lib_rule_test (see /var/lib/buildkite-agent/.cache/bazel/_bazel_buildkite-agent/ec321eb2cc2d0f8f91b676b6d4c66c29/execroot/rules_rust/bazel-out/k8-fastbuild/testlogs/test/rust/hello_lib_rule_test/test.log)
(14:48:13) FAIL: //test/rust:hello_world_rule_test (see /var/lib/buildkite-agent/.cache/bazel/_bazel_buildkite-agent/ec321eb2cc2d0f8f91b676b6d4c66c29/execroot/rules_rust/bazel-out/k8-fastbuild/testlogs/test/rust/hello_world_rule_test/test.log)
(14:48:13) FAIL: //test:hello_world_rule_test (see /var/lib/buildkite-agent/.cache/bazel/_bazel_buildkite-agent/ec321eb2cc2d0f8f91b676b6d4c66c29/execroot/rules_rust/bazel-out/k8-fastbuild/testlogs/test/hello_world_rule_test/test.log)
(14:48:13) FAIL: //test/rustc_env_files:output_test (see /var/lib/buildkite-agent/.cache/bazel/_bazel_buildkite-agent/ec321eb2cc2d0f8f91b676b6d4c66c29/execroot/rules_rust/bazel-out/k8-fastbuild/testlogs/test/rustc_env_files/output_test/test.log)
(14:48:14) ERROR: <builtin>: Coverage report generation failed: (Exit 34): INVALID_ARGUMENT: Invalid arguments:
  "command.ValidateSpec": Invalid spec - docker container must be specified
java.io.IOException: io.grpc.StatusRuntimeException: INVALID_ARGUMENT: Invalid arguments:
  "command.ValidateSpec": Invalid spec - docker container must be specified
	at com.google.devtools.build.lib.remote.GrpcRemoteExecutor.executeRemotely(GrpcRemoteExecutor.java:235)
	at com.google.devtools.build.lib.remote.RemoteExecutionService.executeRemotely(RemoteExecutionService.java:1496)
	at com.google.devtools.build.lib.remote.RemoteSpawnRunner.lambda$exec$2(RemoteSpawnRunner.java:269)
	at com.google.devtools.build.lib.remote.Retrier.execute(Retrier.java:244)
	at com.google.devtools.build.lib.remote.RemoteRetrier.execute(RemoteRetrier.java:127)
	at com.google.devtools.build.lib.remote.RemoteRetrier.execute(RemoteRetrier.java:116)
	at com.google.devtools.build.lib.remote.RemoteSpawnRunner.exec(RemoteSpawnRunner.java:244)
	at com.google.devtools.build.lib.exec.SpawnRunner.execAsync(SpawnRunner.java:301)
	at com.google.devtools.build.lib.exec.AbstractSpawnStrategy.exec(AbstractSpawnStrategy.java:152)
	at com.google.devtools.build.lib.exec.AbstractSpawnStrategy.exec(AbstractSpawnStrategy.java:112)
	at com.google.devtools.build.lib.exec.SpawnStrategyResolver.exec(SpawnStrategyResolver.java:46)
	at com.google.devtools.build.lib.bazel.coverage.CoverageReportActionBuilder$CoverageReportAction.execute(CoverageReportActionBuilder.java:152)
	at com.google.devtools.build.lib.skyframe.SkyframeActionExecutor$5.execute(SkyframeActionExecutor.java:957)
	at com.google.devtools.build.lib.skyframe.SkyframeActionExecutor$ActionRunner.continueAction(SkyframeActionExecutor.java:1124)
	at com.google.devtools.build.lib.skyframe.SkyframeActionExecutor$ActionRunner.run(SkyframeActionExecutor.java:1082)
	at com.google.devtools.build.lib.skyframe.ActionExecutionState.runStateMachine(ActionExecutionState.java:160)
	at com.google.devtools.build.lib.skyframe.ActionExecutionState.getResultOrDependOnFuture(ActionExecutionState.java:93)
	at com.google.devtools.build.lib.skyframe.SkyframeActionExecutor.executeAction(SkyframeActionExecutor.java:516)
	at com.google.devtools.build.lib.skyframe.ActionExecutionFunction.checkCacheAndExecuteIfNeeded(ActionExecutionFunction.java:827)
	at com.google.devtools.build.lib.skyframe.ActionExecutionFunction.computeInternal(ActionExecutionFunction.java:323)
	at com.google.devtools.build.lib.skyframe.ActionExecutionFunction.compute(ActionExecutionFunction.java:161)
	at com.google.devtools.build.skyframe.AbstractParallelEvaluator$Evaluate.run(AbstractParallelEvaluator.java:571)
	at com.google.devtools.build.lib.concurrent.AbstractQueueVisitor$WrappedRunnable.run(AbstractQueueVisitor.java:382)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
	at java.base/java.lang.Thread.run(Unknown Source)
Caused by: io.grpc.StatusRuntimeException: INVALID_ARGUMENT: Invalid arguments:
  "command.ValidateSpec": Invalid spec - docker container must be specified
	at io.grpc.Status.asRuntimeException(Status.java:535)
	at io.grpc.stub.ClientCalls$BlockingResponseStream.hasNext(ClientCalls.java:648)
	at com.google.devtools.build.lib.remote.GrpcRemoteExecutor.lambda$executeRemotely$2(GrpcRemoteExecutor.java:169)
	at com.google.devtools.build.lib.remote.Retrier.execute(Retrier.java:244)
	at com.google.devtools.build.lib.remote.RemoteRetrier.execute(RemoteRetrier.java:127)
	at com.google.devtools.build.lib.remote.RemoteRetrier.execute(RemoteRetrier.java:116)
	at com.google.devtools.build.lib.remote.GrpcRemoteExecutor.lambda$executeRemotely$3(GrpcRemoteExecutor.java:140)
	at com.google.devtools.build.lib.remote.util.Utils.refreshIfUnauthenticated(Utils.java:523)
	at com.google.devtools.build.lib.remote.GrpcRemoteExecutor.executeRemotely(GrpcRemoteExecutor.java:138)
	... 25 more

[meteorcloudy]

/cc @coeuvre any idea?

[UebelAndre]

I've deferred the issue mentioned on #2001 (comment) to #2005

[UebelAndre]

Adding @krasimirgg and @scentini to see if I can't get this merged soon for the release 😅

[UebelAndre]

I made #2004 as a minor spinoff so there's a unique commit for the change.