avm2: Support ScriptObject from avm2 in ExternalInterface #26395

Job	Run time
Paths filter	6s
Test Node.js 20 / ubuntu-24.04	3m 55s
Test Node.js 20 / windows-latest	6m 0s
Build for browser tests	1m 58s
Test Node.js ${{ matrix.node_version }} / ${{ matrix.os }}	0s
Test Node.js 22 / ubuntu-24.04	4m 9s
Test in ${{ matrix.browser }}	0s
Test Node.js 22 / windows-latest	6m 32s
Test in chrome	1m 51s
Test in firefox	3m 3s
Test in edge	2m 6s
	29m 40s

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