svt-av1: 2.1.2 -> 2.2.0

[hexacera]

Description of changes

As a follow-up of #228556, this PR enables some additional optimization flags:

• -DSVT_AV1_PGO=ON: Enables profile-guided optimization, according to official build instructions: "(LTO and PGO can be combined, for maximum gains)". See build.sh.
• -DCMAKE_BUILD_TYPE=Release, -DNATIVE=ON are also from the source that #228556 referenced.

Enabling PGO only works with 2.2.0, so this PR also bumps version from 2.1.2 to 2.2.0, see release notes.

Things done

• Built on platform(s)
  • x86_64-linux
  • aarch64-linux
  • x86_64-darwin
  • aarch64-darwin
• For non-Linux: Is sandboxing enabled in nix.conf? (See Nix manual)
  • sandbox = relaxed
  • sandbox = true
• 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/)
• 24.11 Release Notes (or backporting 23.11 and 24.05 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.

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[emilazy]

Note that PGO is in conflict with reproducibility, and this package is in the closure of several critical packages like ffmpeg, so this would most likely compromise the reproducibility of the installer ISOs.

[jopejoe1]

I would recommend droping the second commit as it currently breaks reproducibility.

[hexacera]

Thanks @emilazy and @jopejoe1! I see that's why these flags aren't enabled already. I have dropped the second commit and updated the PR title such that this PR is a version bump only.

[jopejoe1]

Thanks for updating the pr, the changes now look good to me, and I tested that they work by encoding a video in FFmpeg with it and playing the resulting video.

Just one issue, that I overlooked in my previous review is that this should be targeting staging, could you please rebase the changes onto it, while follow the instructions from https://github.com/NixOS/nixpkgs/blob/master/CONTRIBUTING.md#rebasing-between-branches-ie-from-master-to-staging carefully.
Thanks!

[hexacera]

Thanks @jopejoe1 ! I have switched target to staging.

[jopejoe1]

Thanks!