lazygit does not consider `$LC_MESSAGES`

**Describe the bug**

l10n support in lazygit does not consider the `$LC_MESSAGES` environment variable. Only `$LANG` and `$LC_ALL` seem to have any effect.

**To Reproduce**

1. Set `$LANG` to a different value than `C` or `en_US.UTF-8`
2. Set `$LC_MESSAGES` to `en_US.UTF-8`
3. Launch lazygit
4. Observe localized messages

**Expected behavior**

I expected lazygit to output non-localized (English) messages because `$LC_MESSAGES` is supposed to override `$LANG`

**Version info:**

```
$ lazygit --version
commit=v0.40.2, build date=2023-08-12T17:47:33Z, build source=binaryRelease, version=0.40.2, os=linux, arch=amd64, git version=2.44.0

$ git --version
git version 2.44.0
```