Merge bitcoin/bitcoin#30485: log: Remove NOLINT(bitcoin-unterminated-logprintf)

fa18fc705084f3620be566d8c6639b29117ccf68 log: Remove NOLINT(bitcoin-unterminated-logprintf) (MarcoFalke)

Pull request description:

  `NOLINT(bitcoin-unterminated-logprintf)` is used to document a missing trailing `\n` char in the format string. This has many issues:

  * It is just documentation, assuming that a trailing `\n` ends up in the formatted string. It is not enforced at compile-time, so it is brittle.
  * If the newline was truly missing and `NOLINT(bitcoin-unterminated-logprintf)` were used to document a "continued" line, the log stream would be racy/corrupt, because any other thread may inject a log message in the meantime.
  * If the newline was accidentally missing, nothing is there to correct the mistake.
  * The intention of all code is to always end a log line with a new line. However, historic code exists to deal with the case where the new line was missing (`m_started_new_line`). This is problematic, because the presumed dead code has to be maintained (https://github.com/bitcoin/bitcoin/pull/30386#discussion_r1682963306).

  Fix almost all issues by removing the `NOLINT(bitcoin-unterminated-logprintf)`, ensuring that a new line is always present.

  A follow-up will remove the dead logging code.

ACKs for top commit:
  TheCharlatan:
    ACK fa18fc705084f3620be566d8c6639b29117ccf68
  ryanofsky:
    Code review ACK fa18fc705084f3620be566d8c6639b29117ccf68

Tree-SHA512: bf8a83723cca84e21187658edc19612da79c34f7ef2e1f6e9353e7ba70e4ecc0a878a2ae32290045fb90cba9a44451e35341a36ef2ec1169d13592393aa4a8ca

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