BACKPORT NOTICE: excludes ci/test/00_setup_env_i686_multiprocess.sh changes, however, these do not satisfy enough this to be partial to me

3333f14 depends: Bump to capnproto-c++-1.0.1 (MarcoFalke)

Pull request description:

  Reasons:
  * Debian is starting to ship this version in Trixie (https://packages.debian.org/trixie/capnproto), which will likely become the version shipped with Ubuntu 24.04 LTS. So testing with this version will help to find any issues before real users start to use those distro packages.
  * The feature is currently experimental, so bumping the version shouldn't cause any production issues.
  * With multiprocess begin a priority project for 27.0, it seems better to do build system changes/bumps early, rather than later, to allow for more time testing them.

ACKs for top commit:
  TheCharlatan:
    Re-ACK 3333f14
  fanquake:
    ACK 3333f14 - the response from upstream is that [if we submit a PR, they can take a look](capnproto/capnproto#1833 (comment)), so if anyone would like this to work for Windows, I'd suggest sending a patch.
  ryanofsky:
    Code review ACK 3333f14

Tree-SHA512: 7d53ad1536f042ab43dbc7847126b826e7fc76694f173c348b835fd1067b8f3dd682c5bcb4887f09ee85bab69130721cd7f8fb96b2e82053d4e28bd5c38bdc5f

…eprecation warnings

21bfee0 depends: bump libmultiprocess to fix capnproto deprecation warnings (Ryan Ofsky)

Pull request description:

  This incorporates PR bitcoin-core/libmultiprocess#88 and reverts the NO_WERROR CI workaround added in bitcoin#28735

  Upstream diff: bitcoin-core/libmultiprocess@61d5a0e...414542f

  ---

  This PR is part of the [process separation project](bitcoin#28722).

ACKs for top commit:
  maflcko:
    lgtm ACK 21bfee0
  hebasto:
    ACK 21bfee0, I have reviewed the code and it looks OK. I've also skimmed through the related changes in the https://github.com/chaincodelabs/libmultiprocess repository.

Tree-SHA512: b5addb0deed694eeec62a0ae08b4715a811110201f39f3e6cadee8fc4e6231b0e66c844a98512072a1445bac122ab561dc1711e27fb4d7ac5c08ac46780a4acf

…++20 macos build error

b8105b3 depends: Update libmultiprocess library to fix C++20 macos build error (Ryan Ofsky)

Pull request description:

  Fixes bitcoin#29248

  The std::result_of type was removed in c++20, but was being referenced in some old, unused code in the library. The issue was fixed in:

  - bitcoin-core/libmultiprocess#91

  This update also includes other recent libmultiprocess changes to improve C++20 support and fix build issues:

  - bitcoin-core/libmultiprocess#89
  - bitcoin-core/libmultiprocess#90
  - bitcoin-core/libmultiprocess#93

ACKs for top commit:
  fanquake:
    ACK b8105b3.

Tree-SHA512: 2ca64b5fc27be752baba38df4b4faf62152e18c70ead6e0e063f1cb0c25dd5d924dec7ebfd7f8bbd651ae50eb35e8d8b591a9847c36f22558b5f5effccf56536

d318c4e depends: bump libmultiprocess for CMake fixes (Cory Fields)

Pull request description:

  Broken out of bitcoin#30454 . Bumped [even further](bitcoin@4883197#r1684802528) after bitcoin-core/libmultiprocess#98 was merged upstream.

  hebasto Presumably this approach works now with the CMake branch?

ACKs for top commit:
  ryanofsky:
    Code review ACK d318c4e.

Tree-SHA512: 4b5491f73c0063d09e8339829cd831b1f4c441dd7b55a22037c9337c80cce19bb00a3e5cf925efa77d6d4e89ab45482f40f5799bc14948f8cabcbad3c3549430

faa3598 ci: Add missing qttools5-dev install to Asan task (MarcoFalke)

Pull request description:

  This is required, according to the docs:

  ```
  $ git grep --line-number 'qtbase5-dev qttools5-dev qttools5-dev-tools' doc
  doc/build-unix.md:84:    sudo apt-get install qtbase5-dev qttools5-dev qttools5-dev-tools
  ```

  Also, needed for cmake.

ACKs for top commit:
  hebasto:
    ACK faa3598.

Tree-SHA512: c986908f757d70d958267c1e902b5d7d94589360db61ddf7b9b398cd635b2172e83510c0c77fd6032810166342a286c0f95225b6c6639acd869e1e51c3348ea7