Bug 1764841 [wpt PR 33647] - Set acquiring import maps to false on <link rel=modulepr...

Bug 1764841 [wpt PR 33647] - Set acquiring import maps to false on <link rel=modulepreload>, a=testonly

Automatic update from web-platform-tests
Set acquiring import maps to false on <link rel=modulepreload>

... as spec'ed:
https://wicg.github.io/import-maps/#wait-for-import-maps

This CL also adds WPTs to cover more cases as for
the acquiring import maps flag.

Bug: 1313317
Change-Id: I2e6429f0eaacfbc92c8ec558020b656f3a64d322
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3587447
Reviewed-by: Kouhei Ueno <kouhei@chromium.org>
Commit-Queue: Hiroshige Hayashizaki <hiroshige@chromium.org>
Cr-Commit-Position: refs/heads/main@{#994948}

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wpt-commits: 4ba8a4a1f41e166289c0a7feaa5665e1385e90f3
wpt-pr: 33647