There is an updated pull request by oreo639 against master on the void-packages repository

https://github.com/oreo639/void-packages gsession
https://github.com/void-linux/void-packages/pull/39196

gnome-session: remove outdated workaround and fix overwriting lang
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#### Testing the changes
- I tested the changes in this PR: **YES**

This fixes the language preference so it can work when using both GDM and GNOME.

If there are any issues, feel free to let me know.
I used GDM_LANG since it is stated [here](https://gitlab.gnome.org/GNOME/gdm/-/blob/42.0/docs/ko/ko.po#L837-839) as existing explicitly for this purpose (resetting LANG after loading `/etc/profile`).

Closes: https://github.com/void-linux/void-packages/issues/15292

cc: @paper42 

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A patch file from https://github.com/void-linux/void-packages/pull/39196.patch is attached