CNDB-15239: Add ALLOW FILTERING to AbstractReadQuery#toCQLString

[adelapena]

Add ALLOW FILTERING to AbstractReadQuery#toCQLString.

This makes the output of toCQLString a bit more distracting, but with the possible benefit of guaranteeing that the output of that method is always runnable. This is the ASF behaviour, for good or for worse.

[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

[driftx]

Adding AF everywhere is what it is, but that works for me.

[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-1974 approved by Butler

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Approved by Butler
See build details here