Bug 1824789 [wpt PR 39221] - [Maintenance] Adding step-level comments to Web-Locks...

Bug 1824789 [wpt PR 39221] - [Maintenance] Adding step-level comments to Web-Locks WPTs, a=testonly

Automatic update from web-platform-tests
[Maintenance] Adding step-level comments to Web-Locks WPTs

This CL adds step-by-step comments to both the internal and external
Web-Locks WPTs. Note: some tests share the same resource files, for
clarity, I have provided the file that the step listed comes from.
Ultimately, I feel it is better to have more comments rather than
duplicating the code so that each test may own its own copy.

Fixed: 1420979
Change-Id: Iadf3eae2cc68759ed24be0819d2f3aef822fced2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4355293
Reviewed-by: Andrew Williams <awillia@chromium.org>
Commit-Queue: Kyra Seevers <kyraseevers@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1127663}

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wpt-commits: 1e98fa83922fc500851739f0ced04f7f19d053b0
wpt-pr: 39221