gst_all_1: 1.20.3 -> 1.22.2

[lilyinstarlight]

Description of changes

I was hoping this could make it into 23.05 so that we aren't stuck on stable with an old GStreamer release that won't receive any more fixes. I couldn't find a document describing GStreamer's support model, but they seem to generally make one final bug fix release after a new stable is available and this already occured in late February

If GStreamer 1.22 (which supposedly 1.x releases should be backwards-compatible according to the project, but I did not empirically test this) is not acceptable for 23.05, then I will submit another PR for 1.20.3 -> 1.20.6 and this PR can be marked draft and wait until after branch-off

@RaitoBezarius and @mweinelt, is this acceptable for 23.05?

Release notes: https://gstreamer.freedesktop.org/releases/1.22/

I additionally packaged hotdoc, but currently the generated .json files aren't actually copied to a devdoc output (and to turn those json files into usable documentation, we'd need to package gst-doc and provide those json files to it anyway). Adding it does mean that some helper libexecs for generating documentation are now included in the output, though, which can be helpful

Also if these packages are in need of more maintainers, I'm happy to add myself and ensure they stay relatively up-to-date and functional. Many plugins that do work now are still disabled (which I plan to re-evaluate soon) and there have been several bug fix bumps since the version we have packaged (which was released mid-last-year). Also I'm going to be maintaining gst_all_1.gst-plugins-rs already from #225143

Things done

• Built on platform(s)
  • x86_64-linux (post-rebase on staging)
  • aarch64-linux (pre-rebase on staging)
  • x86_64-darwin (pre-rebase on staging)
  • aarch64-darwin (pre-rebase on staging)
• For non-Linux: Is sandbox = true set in nix.conf? (See Nix manual)
• Tested, as applicable:
  • NixOS test(s) (look inside nixos/tests)
  • and/or package tests
  • or, for functions and "core" functionality, tests in lib/tests or pkgs/test
  • made sure NixOS tests are linked to the relevant packages
• Tested compilation of all packages that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review rev HEAD". Note: all changes have to be committed, also see nixpkgs-review usage
• Tested basic functionality of all binary files (usually in ./result/bin/)
• 23.05 Release Notes (or backporting 22.11 Release notes)
  • (Package updates) Added a release notes entry if the change is major or breaking
  • (Module updates) Added a release notes entry if the change is significant
  • (Module addition) Added a release notes entry if adding a new NixOS module
• Fits CONTRIBUTING.md.

[mweinelt]

Per the release schedule, this can land until 2023/05/01, but we should probably include it right in the next staging cycle, so we have enough time to account for potential regressions.