MWPW-192736: Add check for milolibs query param

[JasonHowellSlavin]

Whitelist branch parameter with /^[a-zA-Z0-9_-]+$/; throw on any other characters.

• Add your specific features or fixes

Resolves: MWPW-NUMBER

Test URLs:

• Before: https://main--bacom--adobecom.aem.live/?martech=off
• After: https://--bacom--adobecom.aem.live/?martech=off

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Commits

• 44640c9 ✅ (latest)

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 95.87%. Comparing base (8d281be) to head (44640c9).
⚠️ Report is 19 commits behind head on stage.

Additional details and impacted files

@@            Coverage Diff             @@
##            stage     #356      +/-   ##
==========================================
+ Coverage   95.82%   95.87%   +0.05%     
==========================================
  Files          13       13              
  Lines        1412     1431      +19     
==========================================
+ Hits         1353     1372      +19     
  Misses         59       59              

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