gh-136692: Provide extra debug info when monitoring assertion fails

[colesbury]

We are seeing occasional failures in the free threading buildbots, but they are difficult to reproduce locally. Add some extra information to the failure messages.

• Issue: test_free_threading.test_monitoring flaky (occasional reference leak) #136692

[colesbury]

!buildbot AMD64 CentOS9 NoGIL Refleaks 3.x

[bedevere-bot]

The regex 'AMD64 CentOS9 NoGIL Refleaks 3.x' did not match any buildbot builder. Is the requested builder in the list of stable builders?

[colesbury]

!buildbot AMD64 CentOS9 NoGIL

[bedevere-bot]

🤖 New build scheduled with the buildbot fleet by @colesbury for commit aa1137f 🤖

Results will be shown at:

https://buildbot.python.org/all/#/grid?branch=refs%2Fpull%2F141832%2Fmerge

The command will test the builders whose names match following regular expression: AMD64 CentOS9 NoGIL

The builders matched are:

• AMD64 CentOS9 NoGIL Refleaks PR
• AMD64 CentOS9 NoGIL PR

[colesbury]

!buildbot AMD64 Fedora Rawhide NoGIL refleaks

[bedevere-bot]

🤖 New build scheduled with the buildbot fleet by @colesbury for commit aa1137f 🤖

Results will be shown at:

https://buildbot.python.org/all/#/grid?branch=refs%2Fpull%2F141832%2Fmerge

The command will test the builders whose names match following regular expression: AMD64 Fedora Rawhide NoGIL refleaks

The builders matched are:

• AMD64 Fedora Rawhide NoGIL refleaks PR

[colesbury]

!buildbot AMD64 CentOS9 NoGIL Refleaks

[bedevere-bot]

🤖 New build scheduled with the buildbot fleet by @colesbury for commit aa1137f 🤖

Results will be shown at:

https://buildbot.python.org/all/#/grid?branch=refs%2Fpull%2F141832%2Fmerge

The command will test the builders whose names match following regular expression: AMD64 CentOS9 NoGIL Refleaks

The builders matched are:

• AMD64 CentOS9 NoGIL Refleaks PR