John Blackbourn 3ff586a4e3 Build/Test Tools: Fix the source code path handling when installing the local development environment.
This ensures the correct code is used to run the installation depending on whether it should be running from the `src` or `build` directory.

Props swissspidy, johnbillion

See #62221

git-svn-id: https://develop.svn.wordpress.org/trunk@59752 602fd350-edb4-49c9-b593-d223f7449a82
2025-02-03 13:35:25 +00:00
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