gh-103088: Ensure POSIX venv scripts always use LF line endings

[zooba]

Also touches the files in no meaningful way to ensure they get updated when pulling

• Issue: If the working directory and the venv are on different disks, venv doesn't work in bash on Windows #103088

[bedevere-bot]

🤖 New build scheduled with the buildbot fleet by @zooba for commit 41b49da 🤖

If you want to schedule another build, you need to add the 🔨 test-with-buildbots label again.

[bedevere-bot]

🤖 New build scheduled with the buildbot fleet by @zooba for commit 41b49da 🤖

If you want to schedule another build, you need to add the 🔨 test-with-refleak-buildbots label again.