Add Cassandra 5.0 storage backend support and integration tests

[Ranexia04]

Addresses #4842.

Summary

Adds Cassandra 5.0 support to the CQL backend: a real bug fix surfaced by running the existing test suite against Cassandra 5.0, plus integration-test coverage so 5.0 is exercised the same way 3.11 / 4.0 are.

Bug fix

When compression is disabled (storage.cql.compression = false), CQLKeyColumnValueStore used the driver's withNoCompression(), which emits the legacy compression = {'sstable_compression': ''} form. Cassandra 5.0 rejects this with InvalidConfigurationInQueryException: Missing sub-option 'class' for the 'compression' option. On Cassandra 5+ we now disable compression via {'enabled': false}, which is accepted by all supported Cassandra versions (3.x/4.x behavior is unchanged). This mirrors the existing version-aware handling already present for the enabled-compression options.

Test coverage

• cassandra5-byteordered, cassandra5-murmur, cassandra5-murmur-ssl, cassandra5-murmur-client-auth Maven profiles (mirroring the cassandra4-* ones), pinned to 5.0.8.
• cassandra5-*.yaml test configs written in the modern Cassandra 5.0 parameter format (unit-suffixed names, e.g. read_request_timeout: 5000ms) so the server boots with no deprecation warnings.
• JanusGraphCassandraContainer.getConfigPrefix() now resolves cassandra5 for 5.x.
• CI matrix entries in ci-backend-cql.yml (diskstorage / graphdb / core / hadoop / ssl / client-auth, Java 11 test client).
• Docs note that 3.11 / 4.0 / 5.0 are integration-tested.

Verification

All cassandra5-* CQL jobs pass on CI. The compression fix was also reproduced and confirmed against a live cassandra:5.0 container: the legacy form reproduces the exact error, while {'enabled': false} succeeds and reads back as {'enabled': 'false'} (which testDisableCFCompressor accepts).

Note on CI cost: this adds ~10 jobs to the always-on tests matrix. Happy to narrow the matrix (e.g. drop the byteordered or ssl/client-auth variants for 5.0) if that's preferred.

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[linux-foundation-easycla]

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• ✅ login: Ranexia04 / name: Henrique Lourenço (ab084e0)

[Ranexia04]

CassandraContainer.withNoCompression() generates compression = {'sstable_compression': ''}, which Cassandra 5.0 rejects with "Missing sub-option 'class' for the 'compression' option". The {'enabled': false} form is accepted by Cassandra 3.x, 4.x, and 5.x, so this branch is only needed for the sstable_compression → enabled rename rather than an incompatibility in the disable-compression semantics themselves.