CNDB-17193 Support Python 3.12 and 3.13 in cqlsh by vendoring pyasyncore

[michaelsembwever]

rebase notes: remove after CASSANDRA-20997

What is the issue

For HCD 2.0, we want to use the latest RedHat 10 images which come with Python 3.12.
For HCD 1.2, we have NetApp asking for Python 3.12 support.

CASSANDRA-20997 seems to be near completion matching both the upcoming releases of HCD 1.2 and HCD 2.0 scheduled for April.

What does this PR fix and why was it fixed

downstream a back-port for cqlsh support for Python 3.12

[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

[michaelsembwever]

fix coming… done.

[michaelsembwever]

(note, from an earlier commit in CC there's duplication in how files are downloaded in .build/build-resolver.xml which i suspect can be cleaned up. out of scope for this pr)

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

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

See analysis details on SonarQube Cloud

[cassci-bot]

❌ Build ds-cassandra-pr-gate/PR-2284 rejected by Butler

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2 regressions found
See build details here

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Found 2 new test failures

Test	Explanation	Runs	Upstream
o.a.c.index.sai.cql.VectorCompaction100dTest.testZeroOrOneToManyCompaction[dc false] ()	NEW	🔴	0 / 30
o.a.c.index.sai.cql.VectorSiftSmallTest.testSiftSmall[dc false] ()	NEW	🔴	0 / 30

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Found 1 known test failures