[FEAT] Add Metal backend CI #454

Job	Run time
Check Spelling	10s
extract-cuda-backend-branch / Extract cuda branch name	3s
check-changed-files / Check Changed Files	9s
Check Code Format	42s
Test field on Linux (babybear, -DEXT_FIELD=ON)	11m 40s
Test curve on Linux (bn254, -DG2=ON -DECNTT=ON)	28m 10s
Build and test Go & RUST hash on Linux	6m 38s
Test field on Linux (stark252, -DEXT_FIELD=OFF)	9m 32s
Run Rust Examples	41m 8s
Test field on Linux (m31, -DEXT_FIELD=ON)	4m 49s
Test curve on Linux (bls12_381, -DG2=ON -DECNTT=ON)	10m 57s
Test curve on Linux (bls12_377, -DG2=ON -DECNTT=ON)	15m 48s
Test field on Linux (koalabear, -DEXT_FIELD=ON)	14m 15s
Test curve on Linux (bw6_761, -DG2=ON -DECNTT=ON)	16m 1s
Test ring on Linux (labrador)	1m 43s
Test curve on Linux (grumpkin, -DG2=OFF -DECNTT=OFF)	12m 42s
	2h 54m 27s

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