fix: https://github.com/AxisCommunications/go-dpop/issues/9

[zg009]

Describe your changes

Please include a summary of the change, a relevant motivation and context.
-Updated
utils.go - Added the StripQueryAndFragments function to remove them explicitly from an httpURL and return a string which is called in parse.go
parse_test.go - Added a test case using a URL with Query and Fragment
utils_test.go - Added test cases proving correctness of utility func

Issue ticket number and link

• Fixes #(issue)
  [Bug]: htu claim is not verified correctly #9

Checklist before requesting a review

• I have performed a self-review of my own code
• I have verified that the code builds perfectly fine on my local system
• I have added tests that prove my fix is effective or that my feature works
• I have commented my code, particularly in hard-to-understand areas
• I have verified that my code follows the style already available in the repository
• [?] I have made corresponding changes to the documentation

Blocking on previous pull due to incorrect branching and overwriting main (If it's an issue I can clone the base repository and force merge and rebuild the project, this was not raising flags in my ide)

[SalladinBalwer]

If you delete the changes inherited from your other branch I think this is good to go. Great work!