Simplify URL parsing for CSI driver endpoint argument

[gkrenn]

Description

The CSI driver currently relies on a custom implementation for URI parsing. This pull request updates the logic to use the built-in net/url package and modifies the endpoint defined in the CSI daemonset to be an absolute path.

Jira

How can this be tested?

• deploy the operator
• the CSI driver running is proof enough, as the livenessprobe relies on the socket to be created.

[codecov-commenter]

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Codecov Report

Attention: Patch coverage is 14.28571% with 6 lines in your changes missing coverage. Please review.

Project coverage is 64.57%. Comparing base (9d2972d) to head (95e01dd).

Files with missing lines	Patch %	Lines
pkg/controllers/csi/driver/server.go	0.00%	6 Missing ⚠️

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Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4009      +/-   ##
==========================================
- Coverage   64.58%   64.57%   -0.02%     
==========================================
  Files         397      397              
  Lines       26416    26411       -5     
==========================================
- Hits        17062    17055       -7     
- Misses       8028     8030       +2     
  Partials     1326     1326              

Flag	Coverage Δ
unittests	64.57% <14.28%> (-0.02%)	⬇️

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[albertogdd]

Works well 👍