[fix] : use UseURL to correctly parse URLs

[rahulait]

What this PR does / why we need it:
Folks keep on using https://api.linode.com/v4 as LINODE_URL. This URL combines both url and api version. When set with SetBaseURL, it incorrectly adds additional /v4 to the URLs and those API calls will fail. Instead of using SetBaseURL(), we should use UseURL() which correctly parses URLs and then itself calls SetBaseURL.
Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged):
Fixes #

Special notes for your reviewer:

TODOs:

• squashed commits
• includes documentation
• adds unit tests
• adds or updates e2e tests

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 4 lines in your changes missing coverage. Please review.

Project coverage is 63.42%. Comparing base (7867960) to head (24d0b48).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
cloud/scope/common.go	0.00%	4 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #630      +/-   ##
==========================================
- Coverage   63.44%   63.42%   -0.03%     
==========================================
  Files          70       70              
  Lines        6084     6086       +2     
==========================================
  Hits         3860     3860              
- Misses       1960     1962       +2     
  Partials      264      264              

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