chore: reduce CI flakiness across webkit/macOS, ubuntu, windows (#1914) #2877

Job	Run time
Java_21 (firefox)	11m 30s
Java_21 (chromium)	5m 59s
Java_21 (webkit)	8m 39s
stable (ubuntu-latest, chrome)	6m 49s
stable (windows-latest, chrome)	13m 2s
stable (windows-latest, msedge)	19m 53s
dev (ubuntu-latest, webkit)	9m 16s
dev (ubuntu-latest, firefox)	12m 30s
stable (macos-latest, msedge)	23m 35s
dev (ubuntu-latest, chromium)	6m 7s
dev (windows-latest, firefox)	19m 41s
stable (macos-latest, chrome)	12m 10s
dev (macos-latest, firefox)	21m 10s
dev (windows-latest, chromium)	12m 15s
dev (windows-latest, webkit)	12m 26s
dev (macos-latest, chromium)	8m 46s
dev (macos-15-xlarge, webkit)	6m 19s
	3h 30m 7s

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