avm2: Add proper API versioning for FTE classes #27200

Job	Run time
Paths filter	8s
Check dependencies	1m 39s
Lints with Rust stable	5m 6s
Test Rust ${{ matrix.rust_version }} / ${{ matrix.os }}	0s
Test Rust stable / ubuntu-24.04	4m 41s
Lints with Rust beta	3m 44s
Test Rust stable / windows-latest	11m 55s
Lints with Rust nightly	5m 20s
Test Rust stable / macos-14	3m 37s
Test Rust nightly / ubuntu-24.04	9m 47s
Test Rust beta / ubuntu-24.04	4m 24s
	50m 21s

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