Add OpenSSL cipher operator tests

[sainadh777]

Summary

• add focused coverage for each OpenSSL cipher expression operator: !, -, +, intersection, and @STRENGTH
• verify colon, comma, and space separators independently
• remove completed TODO item 81.1

Rationale

The parser integration test compared a number of compound expressions with the installed OpenSSL implementation, but it did not isolate each operator. These focused cases make regressions in exclusion, deletion/re-addition, ordering, intersection, strength sorting, and separator handling easier to identify.

Impact

Test-only change. There is no runtime behavior or public API change, so no changelog entry is included.

Validation

Environment: Ubuntu 22.04 container on Linux 6.8 (aarch64), Eclipse Temurin 21.0.12, Ant 1.10.12, OpenSSL 3.0.2.

• ant -Dbase.path=/workspace-cache -Dexecute.validate=true validate
  • BUILD SUCCESSFUL; Checkstyle 14.1.0 checked 7,685 files.
• ant -Dbase.path=/workspace-cache -Dtest.entry=org.apache.tomcat.util.net.openssl.ciphers.TestOpenSSLCipherConfigurationParser test
  • BUILD SUCCESSFUL; 79 tests, 0 failures, 0 errors, 0 skipped.
• ant -Dbase.path=/workspace-cache clean
  • BUILD SUCCESSFUL.
• ant -Dbase.path=/workspace-cache
  • BUILD SUCCESSFUL (clean source/distribution build).
• First ant -Dbase.path=/workspace-cache test on a macOS-backed container bind mount
  • failed after 371m34s in five unrelated suites because the mount retained macOS case behavior and severe I/O timing distortion.
• Each failed suite rerun on the container's native Linux filesystem:
  • TestGroupChannelMemberArrival: BUILD SUCCESSFUL (32s).
  • TestDirResourceSetReadOnly: BUILD SUCCESSFUL (3s).
  • TestChunkedInputFilter: BUILD SUCCESSFUL (29s).
  • TestHttp2Section_6_8: BUILD SUCCESSFUL (29s).
  • TestWsWebSocketContainerTimeoutClient: BUILD SUCCESSFUL (14s).
• Clean native-Linux ant -Dbase.path=/workspace-cache test
  • BUILD SUCCESSFUL in 99m38s; 652 suites, 41,327 tests, 0 failures, 0 errors, 330 skipped.
• Generated-distribution smoke test
  • started /linux-workspace/output/build, received HTTP 200 from http://127.0.0.1:8080/, accepted the shutdown command, exited with status 0, and was reaped cleanly.

The two tested source files were SHA-256 matched byte-for-byte to commit d6d450fd9b938b95a397fa4a957b573c07e74af2 before pushing.

[sainadh777]

@markt-asf, when you have a chance, could you review this test-only change? You are the primary contributor to this cipher parser test.