CNDB-12257: do not call System.getProperty on an hotpath (ChunkCache miss)

[eolivelli]

What is the issue

See #12257

What does this PR fix and why was it fixed

Cache the value

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

[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-1475 rejected by Butler

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

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Found 2 new test failures

Test	Explanation	Branch history	Upstream history
...t=list,wide=true,scenario=MIXED_QUERY]	regression	🔴	🔵🔵🔵🔵🔵🔵🔵
...nt,varint>,wide=false,scenario=COMPACTED_QUERY]	regression	🔴	🔵🔵🔵🔵🔵🔵🔵

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Found 3 known test failures