avm2: Support ScriptObject from avm2 in ExternalInterface #26400

Job	Run time
Paths filter	9s
Test Rust stable / ubuntu-24.04	5m 11s
Lints with Rust stable	4m 42s
Test Rust stable / windows-latest	11m 12s
Lints with Rust beta	4m 24s
Test Rust stable / macos-14	4m 27s
Check dependencies	1m 33s
Test Rust ${{ matrix.rust_version }} / ${{ matrix.os }}	0s
Test Rust nightly / ubuntu-24.04	4m 23s
Lints with Rust nightly	4m 26s
Test Rust beta / ubuntu-24.04	4m 54s
	45m 21s

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