Bug 1803762 [wpt PR 37139] - [Sanitizer API] Remove SanitizerAPINames…

…pacesForTesting flag., a=testonly

Automatic update from web-platform-tests
[Sanitizer API] Remove SanitizerAPINamespacesForTesting flag.

Remove SanitizerAPINamespacesForTesting flag and support code, to
prepare for a new and different namespace-d content in Sanitizer
proposal.

Ref: WICG/sanitizer-api#181
Bug: 1225606
Change-Id: I13ad92898b28d56224c7a227b21390e927e86a17
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4051041
Reviewed-by: Yifan Luo <[email protected]>
Reviewed-by: Koji Ishii <[email protected]>
Reviewed-by: Anders Hartvoll Ruud <[email protected]>
Commit-Queue: Daniel Vogelheim <[email protected]>
Cr-Commit-Position: refs/heads/main@{#1078534}

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wpt-commits: ad194932af87b0503d32282520fcd10c8cc22243
wpt-pr: 37139