refactor(instrumentation-http): avoid deprecated url.parse() in getAbsoluteUrl()

[cjihrig]

Which problem is this PR solving?

getAbsoluteUrl() uses url.parse(), which is deprecated in Node.js. new URL() is preferable.

Does not fix all occurrences of url.parse(), but refers to #6061.

Short description of the changes

This commit updates getAbsoluteUrl() to use new URL() instead of the deprecated url.parse(). As a side effect, the code is a bit simpler.

There are some remaining occurrences in tests, but I would prefer to update those separately.

Type of change

• Bug fix (non-breaking change which fixes an issue)

How Has This Been Tested?

• Test suite.

Checklist:

• Followed the style guidelines of this project
• Unit tests have been added
• Documentation has been updated

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 95.16%. Comparing base (32336f1) to head (55504b4).
⚠️ Report is 5 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #6089   +/-   ##
=======================================
  Coverage   95.16%   95.16%           
=======================================
  Files         316      316           
  Lines        9207     9207           
  Branches     2075     2075           
=======================================
  Hits         8762     8762           
  Misses        445      445           

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[pichlermarc]

Hmm, I think there may be some edge-cases where the instrumentation would throw, but http/https itself would not.

[pichlermarc]

thanks!

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