CNDB-14306: Update ANN_USE_SYNTHETIC_SCORE to default to true for SAI version >EC (#1787)

[driftx]

What is the issue

Fixes: https://github.com/riptano/cndb/issues/14306

What does this PR fix and why was it fixed

When we upgrade past EC, we'll be able to send the scores instead of the vectors. The backwards compatibility for this will be covered in CNDB.

[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]

Used CassandraRelevantProperties, minor checkstyle fixes.

[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-1874 rejected by Butler

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

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Found 33 new test failures

Showing only first 15 new test failures

Test	Explanation	Branch history	Upstream history
...lidation.operations.AlterTest-compression_jdk11	regression	🔴
...nQueryShouldNotTimeoutWhenItExceedesReadTimeout	regression	🔴
...nglePageReadIsFastButAggregationExceedesTimeout	regression	🔴
...adCommitLogAndSSTablesWithDroppedColumnTestCC40	regression	🔴
...adCommitLogAndSSTablesWithDroppedColumnTestCC50	regression	🔴
...oadCommitLogAndSSTablesWithDroppedColumnTestDSE	regression	🔴
...thRestartTest.testReadingValuesOfDroppedColumns	regression	🔴
o.a.c.d.t.s.f.FeaturesVersionSupportDBTest.testANN	regression	🔴
o.a.c.d.t.s.f.FeaturesVersionSupportDCTest.testANN	regression	🔴
o.a.c.d.t.s.f.FeaturesVersionSupportEBTest.testANN	regression	🔴
...c.FeaturesVersionSupportTest.testANNSupport[eb]	regression	🔴
....FeaturesVersionSupportTest.testGeoDistance[aa]	regression	🔴
....FeaturesVersionSupportTest.testGeoDistance[ba]	regression	🔴
...cySSTableTest.testVerifyOldDroppedTupleSSTables	regression	🔴
o.a.c.t.SSTablePartitionsTest.testDirectory	regression	🔴

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No known test failures found