Print old contract when overriding existing alias.

[fnando]

What

Print old contract when overriding existing alias. Notice that we're bypassing the rich printer, because it can be silenced. Instead, we print the contract straight to stderr unconditionally.

$ stellar contract deploy --wasm target/wasm32-unknown-unknown/release/hello_world.wasm --alias=hello
ℹ️ Skipping install because wasm already installed
ℹ️ Using wasm hash 89123eaa2902ec32e26db0141e2d0247e5e00846489f4d8b17d597a85466e863
ℹ️ Simulating deploy transaction…
🌎 Submitting deploy transaction…
ℹ️ Transaction hash is ab3a11357ef533134efd4685985ac19f464e48be86d9732fbc81abcdab6e8c56
🔗 https://stellar.expert/explorer/testnet/tx/ab3a11357ef533134efd4685985ac19f464e48be86d9732fbc81abcdab6e8c56
ℹ️ Signing transaction: ab3a11357ef533134efd4685985ac19f464e48be86d9732fbc81abcdab6e8c56
🔗 https://stellar.expert/explorer/testnet/contract/CCR3PGO7L4RVITA5OR3ZVL5542L53M73PFMJLDY4KY7L6S3ODVXQW6SB
✅ Deployed!
⚠️ Overwriting existing contract id: CAFY4HM4RZSNPQKEV5GDIQRMWO6SJJNMIPSCP4Z4KEP5IZRYCJJFJNBC
CCR3PGO7L4RVITA5OR3ZVL5542L53M73PFMJLDY4KY7L6S3ODVXQW6SB

With --quiet:

$ stellar contract deploy --wasm target/wasm32-unknown-unknown/release/hello_world.wasm --alias=hello --quiet   
ℹ️  Signing transaction: 7f7a7d89321bdd17753d5a00c833c4861f4ff4d6eed654099b05ebd5939ca342
⚠️  Overwriting existing contract id: CBU4J2PH6JUVAF7BFSTWGIBFJUZBZ4V3YHFEIK7AFB4FM53FEGAJD3PP
CBA5HVEZ5O3V6ILGWPKDS3TNTMX7VZ3F5EJVIN7TEEPA7O2RNKZLR5JH

PS: Notice that the signing transaction logging is a bug; we're tracking it at #1840.

Why

Close #1417.

Known limitations

N/A

[leighmcculloch]

I think it's fine if quite doesn't print the old contract ID. Why do we need to print it even if quieted?

[fnando]

Sounds good to me! :)