Add Cody providers to pings

[taras-yemets]

Adds Cody completions and embeddings providers data to pings.
Provider name is always included. Model name is included only for "sourcegraph" provider.

Closes https://github.com/sourcegraph/sourcegraph/issues/58826

BigQuery pings schema update

• https://github.com/sourcegraph/analytics/pull/1028

Site config	Value in pings	Note
{ "cody.enabled": false }	"codyProviders": { "Embeddings": null, "Completions": null }	If Cody is disabled, completions and embeddings are not used. Return empty values similar to GetCompletionsConfig and GetEmbeddingsConfig
{ "cody.enabled": true, "completions": { "chatModel": "claude-v1", "completionModel": "claude-instant-v1", "fastChatModel": "claude-instant-1" "provider": "anthropic", "accessToken": "REDACTED" } }	"codyProviders": { "Embeddings": { "Model": "openai/text-embedding-ada-002", "Provider": "sourcegraph" }, "Completions": { "Provider": "anthropic", "ChatModel": "", "CompletionModel": "", "FastChatModel": "" } }	Cody is enabled, completions config is defined, embeddings - is not. Return only provider name for completions provider (don't return model names as the provider is not "sourcegraph"). Return default embeddings provider.
{ "cody.enabled": true, "embeddings": { "provider": "sourcegraph", "accessToken": "REDACTED" } }	"codyProviders": { "Embeddings": { "Model": "openai/text-embedding-ada-002", "Provider": "sourcegraph" }, "Completions": { "Provider": "sourcegraph", "ChatModel": "anthropic/claude-2.0", "CompletionModel": "anthropic/claude-instant-1", "FastChatModel": "anthropic/claude-instant-1" } }	Cody is enabled, embeddings config is defined, completions - is not. Return the provider and model name for the completions provider (note, the model name is not provided in the site config - the default one is used). Return default completions provider (with model names as the provider is "sourcegraph").

Test plan

• CI passes
• Tested manually: most recent ping contains correct Cody providers data (see values in the table above)

Preview 🤩

Preview Link

[sourcegraph-bot]

Codenotify: Notifying subscribers in CODENOTIFY files for diff 23634d9...0faaf3e.

Notify	File(s)
@unknwon	internal/updatecheck/client.go internal/updatecheck/handler.go internal/updatecheck/handler_test.go

[chwarwick]

See note about model's otherwise I think once you get the test passing it 👍 . Remember to wait for the data pr before merging. Also pings used to require an approved RFC.

[taras-yemets]

Thanks for your review, @chwarwick! Very helpful comments!
UPD: created an RFC

[chwarwick]

Just realized Completions & Embeddings are optional configurations. I think this could or will crash for instances with Cody disabled or ones with the most basic cody.enabled:true setup.

Additionally you should probably use the GetCompletionsConfig and corresponding embeddings one, because it fills in all the defaults.

[taras-yemets]

Thank you, @chwarwick! Updated code and PR description.

[dadlerj]

See comments in the thread about the future of collecting this via pings: https://sourcegraph.slack.com/archives/CN4FC7XT4/p1702399336866429?thread_ts=1702377291.476959&cid=CN4FC7XT4

For now, approved!