PMM-7 fix caching of modules

[ademidoff]

PMM-7

Why:
We see a lot of errors when github actions/cache@v3 tries to restore files from cache. Meanwhile, v4 of actions/setup-go enables cache by default, which make the use of a separate action redundant.

In this PR we will try to fix that. We'll still use actions/cache@v3 for tip versions of go.

Note:
It seems like modules in directories /tools and api-tests/tools won't be cached, since actions/setup-go is able to use only one go.sum file, which in our case resides in the root folder. TODO: see if/how we can leverage the cache-dependency-path parameter.

[codecov]

Codecov Report

Merging #2128 (2b38935) into main (8b427cd) will increase coverage by 0.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #2128      +/-   ##
==========================================
+ Coverage   42.58%   42.59%   +0.01%     
==========================================
  Files         387      387              
  Lines       47651    47651              
==========================================
+ Hits        20291    20299       +8     
+ Misses      25452    25445       -7     
+ Partials     1908     1907       -1     

Flag	Coverage Δ
agent	52.91% <ø> (+0.15%)	⬆️

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see 4 files with indirect coverage changes

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[artemgavrilov]

Please don't merge, I have concerns.

[ademidoff]

Closing this in favor of #2137