Partially revert "project: Fix terminal activation scripts failing on Windows for new shells (#37986) (#38406)

This partially reverts commit 4002602a8926b7fe799acf50fcee6bcffb36d376.
Specifically the parts that closes
https://github.com/zed-industries/zed/issues/38343

Release Notes:

- N/A *or* Added/Fixed/Improved ...
59a609c9fcLukas Wirth committed on 9/18/2025, 10:06:43 AM· committed by GitHubparentca05ff8
3 files changedLine totals unavailable