[Testing] Increasing codecov for linodeclient & linodevolume pkgs

[komer3]

General:

• Have you removed all sensitive information, including but not limited to access keys and passwords?
• Have you checked to ensure there aren't other open or closed Pull Requests for the same bug/feature/question?

Pull Request Guidelines:

1. Does your submission pass tests?
2. Have you added tests?
3. Are you addressing a single feature in this PR?
4. Are your commits atomic, addressing one change per commit?
5. Are you following the conventions of the language?
6. Have you saved your large formatting changes for a different PR, so we can focus on your work?
7. Have you explained your rationale for why this feature is needed?
8. Have you linked your PR to an open issue

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 53.08%. Comparing base (02c9b18) to head (aa0c4aa).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #261      +/-   ##
==========================================
+ Coverage   49.59%   53.08%   +3.49%     
==========================================
  Files          22       22              
  Lines        1587     1588       +1     
==========================================
+ Hits          787      843      +56     
+ Misses        750      700      -50     
+ Partials       50       45       -5     

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