fix: Failing artifact publishing job

[janjakubnanista]

Description

A small shell typo in the script that publishes contract artifacts provided an ample opportunity to delete a couple of lines of code.

The reason why the script was failing in the first place was the fact that what was supposed to be a list of arguments to tar was passed as a single argument. The rest is just cleanup.

Fixes #18273

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 82.10%. Comparing base (f3c8665) to head (4b775d5).
⚠️ Report is 6 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop   #18275      +/-   ##
===========================================
+ Coverage    76.56%   82.10%   +5.53%     
===========================================
  Files          179      124      -55     
  Lines        10732     6699    -4033     
===========================================
- Hits          8217     5500    -2717     
+ Misses        2369     1199    -1170     
+ Partials       146        0     -146     

Flag	Coverage Δ
cannon-go-tests-64	?
contracts-bedrock-tests	82.10% <ø> (ø)

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see 55 files with indirect coverage changes

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