Port CNDB-17080 to main: Add flag to enable/disable SAI histogram metrics

[niksajakovljevic]

CNDB-17080: Add flag to enable/disable SAI histogram metrics - memtableIndexWriteLatency, termsTraversalTotalTime, intersectionLatency, queryLatency (#2267)

What is the issue

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We want to be able to disable SAI histogram metrics

What does this PR fix and why was it fixed

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Add flag to enable/disable SAI histogram metrics -
memtableIndexWriteLatency, termsTraversalTotalTime, intersectionLatency, queryLatency

-Dcassandra.sai.metrics.histograms.enabled
The metrics are kept enabled by default as they were before.

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Co-authored-by: Andrés de la Peña adelapena@users.noreply.github.com

Port of #2267

[github-actions]

Checklist before you submit for review

• This PR adheres to the Definition of Done
• Make sure there is a PR in the CNDB project updating the Converged Cassandra version
• Use NoSpamLogger for log lines that may appear frequently in the logs
• Verify test results on Butler
• Test coverage for new/modified code is > 80%
• Proper code formatting
• Proper title for each commit staring with the project-issue number, like CNDB-1234
• Each commit has a meaningful description
• Each commit is not very long and contains related changes
• Renames, moves and reformatting are in distinct commits
• All new files should contain the DataStax copyright header instead of the Apache License one

[ekaterinadimitrova2]

I see 0 test coverage but the original PR we port clearly shows 100% test coverage - #2267 (comment)

There is ongoing issue discussed here, so we can ignore that for now: https://datastax.slack.com/archives/C0AJK5ME4PN/p1775130881404449

I will review now the code

[ekaterinadimitrova2]

All tests but the VectorLocalTests are known vector tests timing out. There is a WIP from Michael that we will need to pick up once we have cycles for those.

The 0% coverage is wrong and we have 100% coverage as in the original commit and the tests pass.
Please update the commit message before merge, I believe it should point to CNDB-17155

I also opened a ticket for the VectorLocalTests

Thanks for porting this!

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
100.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[cassci-bot]

❌ Build ds-cassandra-pr-gate/PR-2303 rejected by Butler

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4 regressions found
See build details here

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Found 4 new test failures

Test	Explanation	Runs	Upstream
o.a.c.index.sai.cql.VectorBruteforceLocalTest.multipleSegmentsMultiplePostingsTest[version=ed enableNVQ=true enableFused=false] (compression)	REGRESSION	🔴🔵	0 / 30
o.a.c.index.sai.cql.VectorCompaction100dTest.testZeroOrOneToManyCompaction[version=ec enableNVQ=false]	REGRESSION	🔴⚪	0 / 30
o.a.c.index.sai.cql.VectorCompaction2dTest.testZeroOrOneToManyCompaction[version=db enableNVQ=false] (compression)	REGRESSION	🔴🔴	1 / 30
o.a.c.index.sai.cql.VectorSiftSmallTest.testMultiSegmentBuild[version=fa enableNVQ=false enableFused=false]	REGRESSION	🔴⚪	0 / 30

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Found 9 known test failures