Add GitHub ARM64 runners (#1642) #6896

Job	Run time
Container Image	13m 35s
Linux Arm	22m 2s
Docs	1m 10s
Linux x86-64	51m 16s
Mac Arm	11m 26s
Mac Intel	29m 49s
Stdlib	2m 13s
Repolinter	28s
Windows	29m 1s
Mac Universal Binary	58s
Polkadot Integration test with subxt	5m 32s
Solana Integration test	3m 39s
Anchor Integration test	5m 42s
Polkadot Integration test	6m 35s
Visual Code Extension	2m 9s
Coverage report	2m 27s
	3h 8m 2s

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