Fix test workflow

[gerteck]

What is the purpose of this pull request?

• Documentation update
• Bug fix
• Feature addition or enhancement
• Code maintenance
• DevOps
• Improve developer experience
• Others, please explain:

Overview of changes:

Fixes #2861

Remove clear cache flag added as it was causing race condition causing test to fail
Also enforce #2630 by adding flag to make sure tests run sequentially by adding concurrency 1 flag.

Issue was due to race condition.

Anything you'd like to highlight/discuss:

Testing instructions:

Proposed commit message: (wrap lines at 72 characters)

Fix flaky CLI tests

Remove clear cache flag causing race condition
Also make tests run sequentially in GH actions

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Checklist: ☑️

• Updated the documentation for feature additions and enhancements
• Added tests for bug fixes or features
• Linked all related issues
• No unrelated changes

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Reviewer checklist:

Indicate the SEMVER impact of the PR:

• Major (when you make incompatible API changes)
• Minor (when you add functionality in a backward compatible manner)
• Patch (when you make backward compatible bug fixes)

At the end of the review, please label the PR with the appropriate label: r.Major, r.Minor, r.Patch.

Breaking change release note preparation (if applicable):

• To be included in the release note for any feature that is made obsolete/breaking

Give a brief explanation note about:

• what was the old feature that was made obsolete
• any replacement feature (if any), and
• how the author should modify his website to migrate from the old feature to the replacement feature (if possible).

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 71.99%. Comparing base (341b94d) to head (23f01bb).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff            @@
##           master    #2866    +/-   ##
========================================
  Coverage   71.99%   71.99%            
========================================
  Files         132      132            
  Lines        7352     7352            
  Branches     1629     1511   -118     
========================================
  Hits         5293     5293            
- Misses       1958     2053    +95     
+ Partials      101        6    -95     

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