disable compactions when global property is set

[scottfines]

What is the issue

In some environments, compaction is not desirable--it'll never actually run, so we don't want to initialize or manage the related resources (metrics, scheduled tasks, and so forth). In those situations, we want to be able to open a ColumnFamilyStore without initializing Compaction.

Unfortunately, Compaction logic is re-used in ancillary areas (like Schema reads), so we can't just not create the compaction logic. Instead, we need to basically shut it down immediately after creating it.

This manifests as excess resource usage in places like the RegionService, which can be seen in https://github.com/riptano/cndb/issues/17127

What does this PR fix and why was it fixed

This adds a system property to allow process-wide compaction disabling. when this flag is set, the compaction strategy is immediately shutdown after being reloaded. This (should) remove scheduled tasks, metrics, etc. and prevent compaction from using resources needlessly.

STRONG NOTE: I(the author) am not wholly convinced that this is the correct way to do this, and am very open to an alternative path. However, it was the only path that I could determine that did not involve massive changes to the entire codebase.

[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 passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
90.9% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[cassci-bot]

❌ Build ds-cassandra-pr-gate/PR-2280 rejected by Butler

---

10 regressions found
See build details here

---

Found 10 new test failures

Test	Explanation	Runs	Upstream
test_unicode.TestCqlshUnicode.test_unicode_identifier (python3.8.jdk11.no-cython.x86_64)	REGRESSION	🔴	0 / 30
o.a.c.db.ColumnFamilyStoreTest.testDiscardSSTables (compression)	REGRESSION	🔴	0 / 30
o.a.c.db.ColumnFamilyStoreTest.testEmptyRow (compression)	REGRESSION	🔴	0 / 30
o.a.c.db.ColumnFamilyStoreTest.testGetColumnWithWrongBF (compression)	REGRESSION	🔴	0 / 30
o.a.c.db.ColumnFamilyStoreTest.testScrubDataDirectories (compression)	REGRESSION	🔴	0 / 30
o.a.c.db.ColumnFamilyStoreTest.testSnapshotSize (compression)	REGRESSION	🔴	0 / 30
o.a.c.db.ColumnFamilyStoreTest.testSnapshotWithoutFlushWithSecondaryIndexes (compression)	REGRESSION	🔴	0 / 30
o.a.c.index.sai.cql.VectorCompaction100dTest.testCompactionWithEnoughRowsForPQAndDeleteARow[version=ec enableNVQ=false]	REGRESSION	🔴	0 / 30
o.a.c.index.sai.cql.VectorSiftSmallTest.testSiftSmall[version=fa enableNVQ=false enableFused=false]	REGRESSION	🔴	0 / 30
o.a.c.index.sai.cql.VectorTypeTest.multipleSSTablesAndMultipleSegmentsTest[version=ca enableNVQ=false enableFused=false]	REGRESSION	🔴	0 / 30

---

Found 5 known test failures