avm2: Optimize `findpropstrict`, `findproperty`, and `getlex` #22808

Job	Run time
Paths filter	7s
Check dependencies	1m 34s
Test Rust stable / ubuntu-22.04	4m 52s
Test Rust stable / windows-latest	11m 7s
Test Rust ${{ matrix.rust_version }} / ${{ matrix.os }}	0s
Test Rust stable / macos-14	4m 2s
Lints with Rust stable	3m 1s
Test Rust nightly / ubuntu-22.04	5m 7s
Lints with Rust beta	3m 37s
Test Rust beta / ubuntu-22.04	4m 39s
Lints with Rust nightly	4m 33s
	42m 39s

Provide feedback