qcoro: 0.4.0 -> 0.6.0 and AArch64 fix

[samueldr]

Description of changes

Alternative for #185191. I preferred opening a new PR instead of "rudely" changing the semantics of the other PR.

See #185191 (comment)

The TLDR is it is also fixing the packages using qcoro, otherwise they still wouldn't build even though qcoro itself would build. Also changed the fix to use gcc11Stdenv, as suggested by @SuperSandro2000 here.

Things done

I tested with #193858, on x86_64 and AArch64, native builds for both.

• Built on platform(s)
  • x86_64-linux
  • aarch64-linux
  • x86_64-darwin
  • aarch64-darwin
• 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/)
• 22.11 Release Notes (or backporting 22.05 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
  • (Release notes changes) Ran nixos/doc/manual/md-to-db.sh to update generated release notes
• Fits CONTRIBUTING.md.

---

Closes #185191

[samueldr]

Note that while this PR is only 3 days old, the original comment describing this alternative was written 27 days ago.

Since this is used only by Plasma Mobile Gear packages (neochat I believe started as a Plasma Mobile project), this shouldn't cause any issues in things I'm not involved with.