To-Dos for existing formulae

[marcelmbn]

• toml-f and gcp: Re-activate unit tests. For the moment, I disabled them since they fail only due to known bugs, which (apparently) do not alter the standard functionality.

homebrew-qc/Formula/toml-f.rb

Lines 31 to 32 in acb347f

	### reintroduce as soon as issue (https://github.com/toml-f/toml-f/issues/152) is resolved ###
	# system "meson", "test", "-C", "_build", "--no-rebuild", "--num-processes", "1"

homebrew-qc/Formula/gcp.rb

Lines 33 to 34 in acb347f

	### reintroduce as soon as issue (https://github.com/grimme-lab/gcp/issues/26) is resolved ###
	# system "meson", "test", "-C", "_build", "--no-rebuild", "--num-processes", "1"

• Issues to be fixed in particular:
  • Failed tests when compiling with gcc 13.3.0 toml-f/toml-f#152
  • Unit tests break on macos-14 using gcc-14.2.0.1 gcp#26