In preparation for the deprecation of `stdenv.isX`.
These shorthands are not conducive to cross-compilation because they
hide the platforms.
Darwin might get cross-compilation for which the continued usage of `stdenv.isDarwin` will get in the way
One example of why this is bad and especially affects compiler packages
https://www.github.com/NixOS/nixpkgs/pull/343059
There are too many files to go through manually but a treewide should
get users thinking when they see a `hostPlatform.isX` in a place where it
doesn't make sense.
```
fd --type f "\.nix" | xargs sd --fixed-strings "stdenv.is" "stdenv.hostPlatform.is"
fd --type f "\.nix" | xargs sd --fixed-strings "stdenv'.is" "stdenv'.hostPlatform.is"
fd --type f "\.nix" | xargs sd --fixed-strings "clangStdenv.is" "clangStdenv.hostPlatform.is"
fd --type f "\.nix" | xargs sd --fixed-strings "gccStdenv.is" "gccStdenv.hostPlatform.is"
fd --type f "\.nix" | xargs sd --fixed-strings "stdenvNoCC.is" "stdenvNoCC.hostPlatform.is"
fd --type f "\.nix" | xargs sd --fixed-strings "inherit (stdenv) is" "inherit (stdenv.hostPlatform) is"
fd --type f "\.nix" | xargs sd --fixed-strings "buildStdenv.is" "buildStdenv.hostPlatform.is"
fd --type f "\.nix" | xargs sd --fixed-strings "effectiveStdenv.is" "effectiveStdenv.hostPlatform.is"
fd --type f "\.nix" | xargs sd --fixed-strings "originalStdenv.is" "originalStdenv.hostPlatform.is"
```
Semi-automatic update. These checks were performed:
- built on NixOS
- ran `/nix/store/lyxg9xfy3r2k5yzfdxy0qyskkanb702b-delve-1.0.0-bin/bin/dlv -h` got 0 exit code
- ran `/nix/store/lyxg9xfy3r2k5yzfdxy0qyskkanb702b-delve-1.0.0-bin/bin/dlv --help` got 0 exit code
- ran `/nix/store/lyxg9xfy3r2k5yzfdxy0qyskkanb702b-delve-1.0.0-bin/bin/dlv help` got 0 exit code
- ran `/nix/store/lyxg9xfy3r2k5yzfdxy0qyskkanb702b-delve-1.0.0-bin/bin/dlv version` and found version 1.0.0
- found 1.0.0 with grep in /nix/store/lyxg9xfy3r2k5yzfdxy0qyskkanb702b-delve-1.0.0-bin
- found 1.0.0 in filename of file in /nix/store/lyxg9xfy3r2k5yzfdxy0qyskkanb702b-delve-1.0.0-bin
* pkgs: refactor needless quoting of homepage meta attribute
A lot of packages are needlessly quoting the homepage meta attribute
(about 1400, 22%), this commit refactors all of those instances.
* pkgs: Fixing some links that were wrongfully unquoted in the previous
commit
* Fixed some instances