font-{alias,util}, gccmakedep, libp{ciacces,threadstub}s: refactor and migrate to pkgs/by-name from xorg namespace

[quantenzitrone]

This is my next step on refactoring and migrating all xorg packages to pkgs/by-name.
Split of #322521
This is ready for review now.

Done:

• fontalias
• fontutil
• gccmakedep
• libpciaccess
• libpthreadstubs

Will move to another PR:

• libxcvt
• makedepend
• utilmacros
• xbitmaps
• xcbproto
• xkeyboardconfig
• xorgcffiles
• xorgdocs
• xorgsgmldoctools
• xtrans

the list of xorg packages that don't depend on other xorg packages was generated by this script:

#!/usr/bin/env fish

set names (cat pkgs/servers/x11/xorg/default.nix | \
	grep callPackage | \
	string trim | \
	string split -m 1 -f 1 ' ')

for line in (cat pkgs/servers/x11/xorg/default.nix | grep callPackage | string trim)
	set name (string split -m 1 -f 1 ' ' $line)
	set xorgdepscount (string split -m 1 -f 2 ' ' $line | grep -Eo (string join '|' $names) | wc -l)
	if test $xorgdepscount -eq 0
		echo $name
	end
end | sort

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/)
• 25.05 Release Notes (or backporting 24.11 and 25.05 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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[alyssais]

Would probably be easier to review and merge as separate PRs, rather than one big PR for 20 or whatever packages.

[quantenzitrone]

yeah but xorg is over 200 packages and i don't want to do as many prs, so i want to do it in ok-ish chunks
but tbh 5 is probably ok, i will do the other 10 in 2 other prs

[quantenzitrone]

5001+ rebuilds for the hydra, yummy

[quantenzitrone]

i will have to configure my gpg signin, git signed these commits with the wrong key
a job for next year me