CNDB-15897: CNDB-7197: Added SAI_INDEX_METRICS_ENABLED to be able to enable/disable IndexMetrics

[michaelsembwever]

https://github.com/riptano/cndb/issues/15897

Port into main-5.0 commit 8c93136

CNDB-15897: CNDB-7197: Added SAI_INDEX_METRICS_ENABLED to be able to enable/disable IndexMetrics (#2025)

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We want to be able to enable/disable IndexMetrics

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We add a flag to be able to do that -
`SAI_INDEX_METRICS_ENABLED("cassandra.sai.metrics.index.enabled", "true")`
Also, added some simple unit tests to test the new parameter.

[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

[sonarqubecloud]

Quality Gate failed

Failed conditions
4.0% Coverage on New Code (required ≥ 80%)

See analysis details on SonarQube Cloud

[cassci-bot]

❌ Build ds-cassandra-pr-gate/PR-2105 rejected by Butler

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103 regressions found
See build details here

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Found 103 new test failures

Showing only first 15 new test failures

Test	Explanation	Runs	Upstream
test_cqlsh_completion.TestCqlshCompletion.test_complete_command_words (python3.8.jdk11.x86_64.no-cython.x86_64)	REGRESSION	🔴🔴	0 / 15
test_cqlsh_completion.TestCqlshCompletion.test_complete_in_alter_keyspace (python3.8.jdk11.x86_64.no-cython.x86_64)	REGRESSION	🔴🔴	0 / 15
test_cqlsh_completion.TestCqlshCompletion.test_complete_in_alter_type (python3.8.jdk11.x86_64.no-cython.x86_64)	REGRESSION	🔴🔴	0 / 15
test_cqlsh_completion.TestCqlshCompletion.test_complete_in_create_columnfamily (python3.8.jdk11.x86_64.no-cython.x86_64)	REGRESSION	🔴🔴	0 / 15
test_cqlsh_completion.TestCqlshCompletion.test_complete_in_create_table (python3.8.jdk11.x86_64.no-cython.x86_64)	REGRESSION	🔴🔴	0 / 15
test_cqlsh_completion.TestCqlshCompletion.test_complete_in_create_user (python3.8.jdk11.x86_64.no-cython.x86_64)	REGRESSION	🔴🔴	0 / 15
test_cqlsh_completion.TestCqlshCompletion.test_complete_in_delete (python3.8.jdk11.x86_64.no-cython.x86_64)	REGRESSION	🔴🔴	0 / 15
test_cqlsh_completion.TestCqlshCompletion.test_complete_in_drop (python3.8.jdk11.x86_64.no-cython.x86_64)	REGRESSION	🔴🔴	0 / 15
test_cqlsh_completion.TestCqlshCompletion.test_complete_in_drop_keyspace (python3.8.jdk11.x86_64.no-cython.x86_64)	REGRESSION	🔴🔴	0 / 15
test_cqlsh_completion.TestCqlshCompletion.test_complete_in_drop_role (python3.8.jdk11.x86_64.no-cython.x86_64)	REGRESSION	🔴🔴	0 / 15
test_cqlsh_completion.TestCqlshCompletion.test_complete_in_insert (python3.8.jdk11.x86_64.no-cython.x86_64)	REGRESSION	🔴🔴	0 / 15
test_cqlsh_completion.TestCqlshCompletion.test_complete_in_revoke (python3.8.jdk11.x86_64.no-cython.x86_64)	REGRESSION	🔴🔴	0 / 15
test_cqlsh_completion.TestCqlshCompletion.test_complete_in_select_order_by_ann_of (python3.8.jdk11.x86_64.no-cython.x86_64)	REGRESSION	🔴🔴	0 / 15
test_cqlsh_completion.TestCqlshCompletion.test_complete_in_tracing (python3.8.jdk11.x86_64.no-cython.x86_64)	REGRESSION	🔴🔴	0 / 15
test_cqlsh_completion.TestCqlshCompletion.test_complete_in_truncate (python3.8.jdk11.x86_64.no-cython.x86_64)	REGRESSION	🔴🔴	0 / 15

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No known test failures found