ci: only publish after release is created

[JamieDanielson]

Which problem is this PR solving?

• closes [ci] newly created packages are published before the release PR is merged #2020

Short description of the changes

• Add conditional checks to steps that require a release to be created first. Based on docs provided in the action README for Automating publication to npm

[codecov]

Codecov Report

Merging #2133 (e19e517) into main (dfb2dff) will decrease coverage by 0.63%.
Report is 62 commits behind head on main.
The diff coverage is n/a.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2133      +/-   ##
==========================================
- Coverage   90.97%   90.35%   -0.63%     
==========================================
  Files         146      147       +1     
  Lines        7492     7679     +187     
  Branches     1502     1575      +73     
==========================================
+ Hits         6816     6938     +122     
- Misses        676      741      +65     

see 9 files with indirect coverage changes

[pichlermarc]

awesome, thanks for fixing this 🙌