Change kDefaultCTSOptions.debug to false

[kainino0x]

This affects running tests with workers. This should affect WPT, but not standalone which sets the options explicitly. It also shouldn't affect Chromium, though it could have something to do with over-logging we've seen in the past.

I did not actually try running the WPT runtime but this should be a safe change.

Issue: #4172 (code originally from PR #2787)

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Requirements for PR author:

• [n/a] All missing test coverage is tracked with "TODO" or .unimplemented().
• [n/a] New helpers are /** documented */ and new helper files are found in helper_index.txt.
• Test behaves as expected in a WebGPU implementation. (If not passing, explain above.)
• [n/a] Test have be tested with compatibility mode validation enabled and behave as expected. (If not passing, explain above.)

Requirements for reviewer sign-off:

• [n/a] Tests are properly located in the test tree.
• [n/a] Test descriptions allow a reader to "read only the test plans and evaluate coverage completeness", and accurately reflect the test code.
• [n/a] Tests provide complete coverage (including validation control cases). Missing coverage MUST be covered by TODOs.
• [n/a] Helpers and types promote readability and maintainability.

When landing this PR, be sure to make any necessary issue status updates.

[greggman]

lgtm though it appears to only be used in workers.

[kainino0x]

lgtm though it appears to only be used in workers.

That's correct, updated summary.