Allows the restore command to restore contractCode

[vinamogit]

What problem does your feature solve?

When a contract expires, we need to restore the contract data instance and the contract code. The current implementation of the restore command only allows to restore contract data.

What would you like to see?

maybe something like:
soroban contract restore --id CONTRACTID --wasm-hash ab3f....

What alternatives are there?

Call the operation programatically.

[willemneal]

Fixed by #775