fix: workspace provider to use the correct last used workspace

[sahil143]

https://issues.redhat.com/browse/KFLUXUI-225

[codecov]

Codecov Report

Attention: Patch coverage is 90.00000% with 2 lines in your changes missing coverage. Please review.

Project coverage is 80.08%. Comparing base (61e9ed9) to head (253acdd).
Report is 29 commits behind head on main.

Files with missing lines	Patch %	Lines
src/components/Workspace/workspace-context.tsx	90.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #54      +/-   ##
==========================================
+ Coverage   79.94%   80.08%   +0.13%     
==========================================
  Files         568      568              
  Lines       21331    21343      +12     
  Branches     5278     5291      +13     
==========================================
+ Hits        17054    17093      +39     
+ Misses       4252     4225      -27     
  Partials       25       25              

Flag	Coverage Δ
unittests	80.08% <90.00%> (+0.13%)	⬆️

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[Katka92]

The Basic Happy Path test running locally succeeded on this branch.