avm2: Use direct slot access in more native code #26831

Job	Run time
Paths filter	12s
Test Node.js 22 / ubuntu-24.04	3m 51s
Build for browser tests	1m 51s
Test Node.js 22 / windows-latest	7m 12s
Test Node.js 23 / ubuntu-24.04	3m 48s
Test Node.js 23 / windows-latest	5m 37s
Test Node.js ${{ matrix.node_version }} / ${{ matrix.os }}	0s
Test in ${{ matrix.browser }}	0s
Test in chrome	1m 46s
Test in firefox	3m 17s
Test in edge	2m 19s
	29m 53s

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