[conda] Update conda build and add conda publish

[felixdittrich92]

This PR:

• update conda build CI job
• add conda publish and check

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.44%. Comparing base (162a10d) to head (85d67fb).

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Additional details and impacted files

@@           Coverage Diff           @@
##             main      #11   +/-   ##
=======================================
  Coverage   97.44%   97.44%           
=======================================
  Files          61       61           
  Lines        1840     1840           
=======================================
  Hits         1793     1793           
  Misses         47       47           

Flag	Coverage Δ
unittests	97.44% <ø> (ø)

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