web: Support align embed/object attribute (part of #4258) #26957

Job	Run time
Paths filter	6s
Build for browser tests	2m 7s
Test Node.js 22 / ubuntu-24.04	4m 9s
Test Node.js ${{ matrix.node_version }} / ${{ matrix.os }}	0s
Test Node.js 22 / windows-latest	7m 55s
Test in ${{ matrix.browser }}	0s
Test Node.js 23 / ubuntu-24.04	3m 51s
Test Node.js 23 / windows-latest	5m 36s
Test in chrome	1m 45s
Test in firefox	3m 0s
Test in edge	2m 15s
	30m 44s

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