Suppress spurious MockWebServer crash warnings in CI logs

[timtebeek]

Summary

• Route java.util.logging through SLF4J via the jul-to-slf4j bridge, which discards output through the existing slf4j-nop binding in tests
• This suppresses StringIndexOutOfBoundsException crash logs from MockWebServer when normalizeRepository() probes HTTPS on HTTP-only mock servers
• Fix flaky useHttpWhenHttpsFails test by switching from enqueue to Dispatcher, avoiding TLS probe bytes consuming the single enqueued response

Test plan

• Verified mirrorsAndAuth, useHttpWhenHttpsFails, latestOrReleaseVersionInDependencyManagement, and systemPropertyTakesPrecedence pass with no MockWebServer crash output
• Ran useHttpWhenHttpsFails multiple times to confirm flakiness is resolved

[timtebeek]

Much cleaner:

> Task :rewrite-maven:test
Generating HTML test report...
Finished generating test html results (0.124 secs) into: /home/runner/work/rewrite/rewrite/rewrite-maven/build/reports/tests/test
Finished generating test XML results (0.026 secs) into: /home/runner/work/rewrite/rewrite/rewrite-maven/build/test-results/test
Stored cache entry for task ':rewrite-maven:test' with cache key 47737dc3eab01540514040f949319ff2
Resolve mutations for :rewrite-maven:check (Thread[#161,Execution worker Thread 2,5,main]) started.
:rewrite-maven:check (Thread[#161,Execution worker Thread 2,5,main]) started.
> Task :rewrite-maven:check
Skipping task ':rewrite-maven:check' as it has no actions.
Resolve mutations for :rewrite-maven:build (Thread[#161,Execution worker Thread 2,5,main]) started.
:rewrite-maven:build (Thread[#161,Execution worker Thread 2,5,main]) started.
> Task :rewrite-maven:build
Skipping task ':rewrite-maven:build' as it has no actions.