Add separate job for windows in CI test worfklow

[ashleve]

What does this PR do?

Adds separate job for windows in Tests workflow.

Makes Tests workflow install sh package if os is not windows.

Otherwise shell tests wouldn't be executed.

Before submitting

• Did you make sure title is self-explanatory and the description concisely explains the PR?
• Did you make sure your PR does only one thing, instead of bundling different changes together?
• Did you list all the breaking changes introduced by this pull request?
• Did you test your PR locally with pytest command?
• Did you run pre-commit hooks with pre-commit run -a command?

Did you have fun?

Make sure you had fun coding 🙃

[codecov-commenter]

Codecov Report

Merging #422 (96f2ec6) into main (8987b23) will increase coverage by 14.24%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##             main     #422       +/-   ##
===========================================
+ Coverage   68.66%   82.90%   +14.24%     
===========================================
  Files          11       11               
  Lines         351      351               
===========================================
+ Hits          241      291       +50     
+ Misses        110       60       -50     

Impacted Files	Coverage Δ
src/tasks/train_task.py	95.12% <0.00%> (+2.43%)	⬆️
src/utils/utils.py	64.48% <0.00%> (+14.01%)	⬆️
src/utils/rich_utils.py	82.60% <0.00%> (+50.00%)	⬆️
src/train.py	100.00% <0.00%> (+100.00%)	⬆️

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