Add support for Soroban external calls 🎉 #7058

Job	Run time
Linux Arm	20m 21s
Docs	1m 17s
Container Image	11m 45s
Linux x86-64	37m 59s
Mac Arm	10m 55s
Mac Intel	1s
Repolinter	13s
Stdlib	3s
Windows	30m 5s
Mac Universal Binary	0s
Soroban Integration test	0s
Solana Integration test	0s
Anchor Integration test	0s
Polkadot Integration test	0s
Polkadot Integration test with subxt	0s
Visual Code Extension	0s
Coverage report	0s
	1h 52m 39s

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