2495110012 test: add coverage for -rpcwallet cli option (Jon Atack)
Pull request description:
The bitcoin-cli `-rpcwallet=` option is an essential RPC/CLI option when more than one wallet is loaded (see `bitcoin-cli -help | grep -A5 rpcwallet` or `src/bitcoin-cli.cpp::L61`) and it currently has no test coverage.
It is not only used by users, but also by the test framework and ~10 test files via `get_wallet_rpc()`.
This PR adds coverage, while simultaneously improving the `-getinfo` coverage when multiple wallets are loaded. This is similar to the test coverage that would be added in #18594.
ACKs for top commit:
robot-visions:
ACK 2495110012
Tree-SHA512: caaa8b99fb8fa481ab2c6b2a287ed29720bb4553c3f66657462c44fa2990acaaf36cabeaaf81408678e5fdce4e105d729dd94b5ed8588dd1a6f2cb03fc25acf3
by calling wait_for_cookie_credentials() to ensure the cookie file is written
and auth credentials available for testing the CLI -rpcwait option before the
RPC connection is up.
In accordance with #17314, Removing noisy fields from -getinfo. Fields removed: protocolversion, walletversion and keypoololdest. In addition to changing bitcoin-cli -getinfo, there is another change to test/functional/interface_bitcoin_cli.py. This change deletes tests that utilize removed -getinfo calls.
3f6568d66b cli: remove duplicate wallet fields from -getinfo (fanquake)
Pull request description:
`walletversion` and `balance` are both included below.
Tree-SHA512: cd9fe9739a2f492c8f7c0407b43a6fa95187f7e5318f05e080bac112f9f4333d2e9b84c505d098f8d66fa79439007d1c0b22e5a87d70bf5ea53ab647ee4c2046
Before this patch:
```
$ bitcoin-cli -testnet echo 'hello world'
error: Could not locate RPC credentials. No authentication cookie could be found, and RPC password is not set. See -rpcpassword and -stdinrpcpass. Configuration file: (/root/.bitcoin/bitcoin.conf)
```
After this patch:
```
$ bitcoin-cli -testnet echo 'hello world'
error: Could not connect to the server 127.0.0.1:18332
Make sure the bitcoind server is running and that you are connecting to the correct RPC port.
```
