CNDB-14167: Set jvector_version on disk file format to 2 (#1757) (#1760)

[driftx]

Fixes: https://github.com/riptano/cndb/issues/14167

We upgraded to jvector 4 too soon. We need to use jvector 2 for a release cycle and then when we upgrade next, we can go to jvector 4. We needed a two phase release.

CNDB test PR: https://github.com/riptano/cndb/pull/14196

[github-actions]

Checklist before you submit for review

• 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

[driftx]

Changed in CassandraRelevantProperties

[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-1830 rejected by Butler

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11 new test failure(s) in 1 builds
See build details here

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Found 11 new test failures

Test	Explanation	Branch history	Upstream history
o.a.c.c.SimpleQueryTest.test2ndaryIndexBug	regression	🔴
...estInterruptedExceptionCachedCounterLockManager	regression	🔴
....r.PendingAntiCompactionTest.testRetriesTimeout	regression	🔴
...adCommitLogAndSSTablesWithDroppedColumnTestCC40	regression	🔴
...adCommitLogAndSSTablesWithDroppedColumnTestCC50	regression	🔴
...oadCommitLogAndSSTablesWithDroppedColumnTestDSE	regression	🔴
...thRestartTest.testReadingValuesOfDroppedColumns	regression	🔴
o.a.c.d.t.r.ForceRepairTest.force	regression	🔴
...estIndexRebuildWhenAddingSStableViaRemoteReload	regression	🔴
...cySSTableTest.testVerifyOldDroppedTupleSSTables	regression	🔴
o.a.c.t.SSTablePartitionsTest.testDirectory	regression	🔴

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No known test failures found