Add support for Soroban external calls 🎉 #7097

Job	Run time
Linux x86-64	22m 37s
Linux Arm	8m 52s
Docs	1m 18s
Container Image	9m 26s
Mac Arm	3m 29s
Mac Intel	9m 56s
Repolinter	1m 8s
Stdlib	2m 12s
Windows	9m 13s
Mac Universal Binary	0s
Solana Integration test	0s
Soroban Integration test	0s
Polkadot Integration test	0s
Anchor Integration test	0s
Polkadot Integration test with subxt	0s
Visual Code Extension	0s
Coverage report	0s
	1h 8m 11s

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