Merge bitcoin/bitcoin#24409: Always output license/copyright info with `-version`

5a89bed410d724360b8f90bd9d7d28d6e62331c0 contrib: address gen-manpages feedback from #24263 (fanquake)
2618fb8d15d01dca967856c92ebf3e4cc09699a2 Output license info when binaries are passed -version (fanquake)
4c3e3c57463b029d335e685d3dcdaf26456666cf refactor: shift CopyrightHolders() and LicenseInfo() to clientversion.cpp (fanquake)

Pull request description:

  Addresses a review comment from #24263, and addresses the [comment](https://github.com/bitcoin/bitcoin/pull/24263#issuecomment-1030582925) where it was pointed out that we are inconsistent with emitting  our copyright. After this change, the copyright is always emitted with `-version`, rather than `-help`, i.e:
  ```bash
  bitcoind -version

  Bitcoin Core version v22.99.0-fc1f355913f6-dirty
  Copyright (C) 2009-2022 The Bitcoin Core developers

  Please contribute if you find Bitcoin Core useful. Visit
  <https://bitcoincore.org/> for further information about the software.
  The source code is available from <https://github.com/bitcoin/bitcoin>.

  This is experimental software.
  Distributed under the MIT software license, see the accompanying file COPYING
  or <https://opensource.org/licenses/MIT>
  ```

  The info is also added to binaries other than `bitcoind`/`bitcoin-qt`. This change also prevents duplicate copyright info appearing in the `bitcoind` man page.

ACKs for top commit:
  laanwj:
    Tested ACK 5a89bed410d724360b8f90bd9d7d28d6e62331c0

Tree-SHA512: 0ac2a1adf9e9de0c3206f35837008e3f93eaf15b193736203d71609273f0887cca20b8a90972cb9f941ebd62b330d61a0cbb5fb1b7a7f2dbc715ed8a0c1569d9

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