Add support for Soroban external calls 🎉 #7052

Job	Run time
Docs	1m 32s
Container Image	11m 57s
Linux Arm	19m 54s
Linux x86-64	35m 56s
Mac Arm	7m 30s
Mac Intel	1s
Repolinter	24s
Stdlib	10s
Windows	9m 5s
Mac Universal Binary	0s
Solana Integration test	0s
Polkadot Integration test	0s
Polkadot Integration test with subxt	0s
Anchor Integration test	0s
Soroban Integration test	0s
Visual Code Extension	0s
Coverage report	0s
	1h 26m 29s

Provide feedback