CNDB-14301: couple jvector file format and SAI version

[michaeljmarshall]

What is the issue

Fixes: https://github.com/riptano/cndb/issues/14301

What does this PR fix and why was it fixed

Make version EB use jvector file format 4. Also allow for some configurability in earlier versions just in case we have some clusters relying on that behavior.

[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

[michaeljmarshall]

Companion CNDB test PR: https://github.com/riptano/cndb/pull/14303

[sonarqubecloud]

Quality Gate passed

Issues
2 New issues
0 Accepted issues

Measures
0 Security Hotspots
97.1% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[cassci-bot]

❌ Build ds-cassandra-pr-gate/PR-1786 rejected by Butler

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

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Found 3 new test failures

Test	Explanation	Branch history	Upstream history
o.a.c.i.s.p.OperationTest.BeforeFirstTest	regression	🔴
o.a.c.n.NodesTest.testPeersSerialization	regression	🔴	🔵🔵🔵🔵🔵🔵🔵
o.a.c.u.b.BinLogTest.testTruncationReleasesLogS...	regression	🔴	🔵🔵🔵🔵🔵🔵🔵

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Found 4 known test failures