[FEAT] Add Metal backend CI #467

Job	Run time
Check Spelling	10s
check-changed-files / Check Changed Files	5s
extract-cuda-backend-branch / Extract cuda branch name	4s
Check Code Format	41s
Run Rust Examples	38m 6s
Test field on Linux (babybear, -DEXT_FIELD=ON)	13m 34s
Test curve on Linux (bn254, -DG2=ON -DECNTT=ON)	14m 2s
Test field on Linux (stark252, -DEXT_FIELD=OFF)	9m 8s
Build and test Go & RUST hash on Linux	6m 55s
Test curve on Linux (bls12_381, -DG2=ON -DECNTT=ON)	15m 33s
Test field on Linux (m31, -DEXT_FIELD=ON)	10m 44s
Test curve on Linux (bls12_377, -DG2=ON -DECNTT=ON)	17m 4s
Test ring on Linux (labrador)	1m 28s
Test field on Linux (koalabear, -DEXT_FIELD=ON)	9m 45s
Test curve on Linux (bw6_761, -DG2=ON -DECNTT=ON)	15m 24s
Test curve on Linux (grumpkin, -DG2=OFF -DECNTT=OFF)	4m 43s
	2h 37m 26s

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