Strip newline char from entries in dag integrity exceptions

[THEdavehogue]

Description

Describe the purpose of this pull request.

Adds a .strip() to each item in the dag_integrity_exceptions.txt file when read by the astro dev parse command and test functions

🎟 Issue(s)

Related #1950

🧪 Functional Testing

List the functional testing steps to confirm this feature or fix.

Was able to test this locally in my astro project. Adding the .strip() for each item in the exceptions list resolved the issue where the files listed would still raise errors.

📸 Screenshots

Add screenshots to illustrate the validity of these changes.

Before fix (with errors):

After fix (errors resolved):

📋 Checklist

• Rebased from the main (or release if patching) branch (before testing)
• Ran make test before taking out of draft
• Ran make lint before taking out of draft
• Added/updated applicable tests
• Tested against Astro-API (if necessary).
• Tested against Houston-API and Astronomer (if necessary).
• Communicated to/tagged owners of respective clients potentially impacted by these changes.
• Updated any related documentation