chore: roll to 1.60.0-alpha-2026-05-05 #2881

Job	Run time
Java_21 (firefox)	17m 58s
stable (macos-latest, msedge)	24m 49s
Java_21 (webkit)	9m 59s
stable (ubuntu-latest, chrome)	7m 32s
stable (windows-latest, msedge)	19m 9s
stable (macos-latest, chrome)	14m 52s
stable (windows-latest, chrome)	12m 16s
Java_21 (chromium)	6m 14s
dev (ubuntu-latest, chromium)	6m 45s
dev (windows-latest, firefox)	20m 45s
dev (macos-latest, firefox)	17m 52s
dev (macos-15-xlarge, webkit)	8m 5s
dev (macos-latest, chromium)	6m 34s
dev (windows-latest, webkit)	12m 38s
dev (windows-latest, chromium)	12m 12s
dev (ubuntu-latest, webkit)	10m 6s
dev (ubuntu-latest, firefox)	13m 57s
	3h 41m 43s

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