log: harmonize bitcoind server logging

Summary:
PR description:

Harmonize the user-facing output of the bitcoind -daemon, bitcoin-cli help stop, bitcoin-cli stop, and bitcoind -version commands to be consistent with each other.

Backport of PR16489

Test Plan:
ninja && ninja check

Check consistency in the output of following commands!

src/bitcoind -version
src/bitcoind -daemon
src/bitcoin-cli help stop
src/bitcoin-cli stop

Reviewers: O1 Bitcoin ABC, #bitcoin_abc, deadalnix

Reviewed By: O1 Bitcoin ABC, #bitcoin_abc, deadalnix

Subscribers: deadalnix

Differential Revision: https://reviews.bitcoinabc.org/D7933