common: no fail-fast and no Docker rebuild on nightly

[janekmi]

Requires:

• common: split nightly into in-tree and packaging testing #5832

Preview: https://github.com/pmem/pmdk/actions/runs/5695026813

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This change is 

[codecov]

Codecov Report

Merging #5834 (3a8aec0) into master (a160f41) will decrease coverage by 0.01%.
Report is 1 commits behind head on master.
The diff coverage is n/a.

❗ Current head 3a8aec0 differs from pull request most recent head 904ad5c. Consider uploading reports for the commit 904ad5c to get more accurate results

@@            Coverage Diff             @@
##           master    #5834      +/-   ##
==========================================
- Coverage   71.01%   71.00%   -0.01%     
==========================================
  Files         131      131              
  Lines       19175    19175              
  Branches     3192     3193       +1     
==========================================
- Hits        13617    13616       -1     
- Misses       5558     5559       +1     

[osalyk]

Reviewed 1 of 1 files at r2, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @janekmi)