[ozone/wayland] mutter: Enable tests failing due to local env

Re-enable tests that can fail only if run locally on gnome shell which
triggers the dark mode listener that can interfere with these tests.
These should pass if running mutter in an isolated environment, e.g. on
CI bots.

More details: https://issues.chromium.org/issues/391903220#comment3

Bug: 391903220
Change-Id: I862e2ac8ff9e53736c1b1eb7cd0c8023f8940d72
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6378225
Commit-Queue: Nick Yamane <nickdiego@igalia.com>
Reviewed-by: Nick Yamane <nickdiego@igalia.com>
Auto-Submit: Orko Garai <orko@igalia.com>
Cr-Commit-Position: refs/heads/main@{#1435754}