ci: Update CI to barebone python [all tests ci]

[lsetiawan]

This PR is a follow up to https://github.com/OSOceanAcoustics/echopype/pull/1191 since even new PR's are failing!

Conda is now removed from CI since there isn't any special packages that we need from there anymore and we're basically already installing via pip through conda anyways. Plus this was a recommendation from Filipe to do over the summer.

[codecov-commenter]

Codecov Report

Merging #1192 (da84598) into dev (ce1e614) will decrease coverage by 4.85%. Report is 1 commits behind head on dev. The diff coverage is 100.00%.

@@            Coverage Diff             @@
##              dev    #1192      +/-   ##
==========================================
- Coverage   81.89%   77.04%   -4.85%     
==========================================
  Files          67       67              
  Lines        5887     5908      +21     
==========================================
- Hits         4821     4552     -269     
- Misses       1066     1356     +290     

Flag	Coverage Δ
unittests	77.04% <100.00%> (-4.85%)	:arrow_down:

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
echopype/convert/parse_azfp.py	93.53% <100.00%> (+0.33%)	:arrow_up:
echopype/convert/set_groups_azfp.py	97.95% <100.00%> (+0.25%)	:arrow_up:

... and 8 files with indirect coverage changes

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[emiliom]

Looks good, thanks! I made one small inline comment. My only other comment is that it looks like the files .ci_helpers/py${{ matrix.python-version }}.yaml are no longer used; or are they actually used in other actions? If not, let's delete them, right?

[lsetiawan]

re they actually used in other actions?

Looks like they're still being used in the windows-utils-test shenanigans that I'm not sure what it's doing. Probably good to have a tests clean up soon that include this stuff.

[emiliom]

Looks like they're still being used in the windows-utils-test shenanigans that I'm not sure what it's doing. Probably good to have a tests clean up soon that include this stuff.

Sounds good. Merge away, and thanks!!