combine migrations into one file

[elfkuzco]

Rationale

This PR combines the migrations into one file

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 80.31%. Comparing base (65335f9) to head (f6df578).
⚠️ Report is 3 commits behind head on cms-upgrade.

Additional details and impacted files

@@             Coverage Diff              @@
##           cms-upgrade     #157   +/-   ##
============================================
  Coverage        80.31%   80.31%           
============================================
  Files               43       43           
  Lines             1702     1702           
  Branches           149      149           
============================================
  Hits              1367     1367           
  Misses             291      291           
  Partials            44       44           

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