Add AuTest for large chunked contents

[masaori335]

This covers 131072 (=128KB) chunked contents handling in HTTP/1.0, HTTP/1.1 and HTTP/2.

Also, this includes extention of ats_replay for HTTP/2 (TLS) cases.

[Copilot]

Pull request overview

This PR adds a new AuTest replay to validate large (128KB) chunked-response handling across HTTP/1.0, HTTP/1.1, and HTTP/2, and extends the ATSReplayTest harness to better support TLS-enabled scenarios needed for HTTP/2-over-TLS testing.

Changes:

• Add a new replay file covering 131072-byte chunked origin responses and expected dechunking / caching behaviors.
• Register the new replay in the existing chunked_encoding gold test suite.
• Extend ats_replay.test.ext to apply TLS-related ATS configuration when autest.ats.process_config.enable_tls is enabled.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.

File	Description
tests/gold_tests/chunked_encoding/replays/large_chunked.replay.yaml	New replay exercising large chunked responses across HTTP/1.0, HTTP/1.1, and HTTP/2.
tests/gold_tests/chunked_encoding/chunked_encoding.test.py	Adds an ATSReplayTest invocation to run the new replay.
tests/gold_tests/autest-site/ats_replay.test.ext	Adds TLS setup logic for ATSReplayTest when ATS is started with TLS enabled.

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