ui: add trace rate option to stmt diagnostics

[maryliag]

Fixes #92415

Add option to select the trace rate for statement
diagnostics collection directly on the Console.

https://www.loom.com/share/beaf1ce16f7d4efc845056e33cb3bee1

Release note (ui change): Add option to select the trace rate for statement diagnostics collection.

[cockroach-teamcity]

This change is 

[dongniwang]

LGTM!

[THardy98]

Reviewed 6 of 6 files at r1, all commit messages.
Reviewable status: complete! 0 of 0 LGTMs obtained (waiting on @maryliag)

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pkg/ui/workspaces/cluster-ui/src/api/statementDiagnosticsApi.ts line 92 at r1 (raw file):

    args.push(samplingProbability);
  } else {
    args.push(0);

Not sure if we want to allow sampling probability of 0, wouldn't this never sample?
Or is 0 a special value that means "always sample" until we get the statement diagnostics bundle?

[maryliag]

Reviewable status: complete! 0 of 0 LGTMs obtained (waiting on @THardy98)

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pkg/ui/workspaces/cluster-ui/src/api/statementDiagnosticsApi.ts line 92 at r1 (raw file):

Previously, THardy98 (Thomas Hardy) wrote…

Not sure if we want to allow sampling probability of 0, wouldn't this never sample?
Or is 0 a special value that means "always sample" until we get the statement diagnostics bundle?

the 0 is what the function expects, but when you passed it actually uses NULL. You can see in the loom some cases with NULL. When we have NULL the sampling is actually 100%

[THardy98]

Reviewable status: complete! 0 of 0 LGTMs obtained (waiting on @maryliag)

[maryliag]

TFTR!
bors r+

[craig]

Build succeeded:

• Bazel Essential CI (Cockroach)

[maryliag]

blathers backport 22.2

[blathers-crl]

Encountered an error creating backports. Some common things that can go wrong:

1. The backport branch might have already existed.
2. There was a merge conflict.
3. The backport branch contained merge commits.

You might need to create your backport manually using the backport tool.

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error creating merge commit from 8842795 to blathers/backport-release-22.2-101381: POST https://api.github.com/repos/cockroachdb/cockroach/merges: 409 Merge conflict []

you may need to manually resolve merge conflicts with the backport tool.

Backport to branch 22.2 failed. See errors above.

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