CBD-6348: Merge remote-tracking branch 'couchbase/trinity' into morpheus

* couchbase/trinity:
  CBD-6348: [BP] [C++20] Add SerialisedDocKey::operator== ...
  CBD-6348: [BP] Various fixes needed to build with C++20
  CBD-6348: [BP] Fix problems with nlohmann and gtest
  CBD-6348: Remove class name in member declaration
  CBD-6348: [BP] Disable fmt format check for WIN32
  CBD-6348: [BP] Changes needed for fmt 10.2
  CBD-6348: [BP] Prepare for nlohmann::json upgrade
  CBD-6348: [BP] Remove deprecated format_to(memory_buffer) overload
  CBD-6348: [BP] Add missing formattors for enum classes
  CBD-6348: Changes required to upgrade boost

Change-Id: Icd6be1f0857e4e04a8c284ee5e240d6708a62aa6

Author: trondn