feat(migrations): add cjs option for emit

[erie0210]

In case @stabai doesn't reply, I'd like to submit my PR.

Closes #4005

[B4nan]

Thanks!

Let's adjust the default glob too, so it respects cjs files automatically, otherwise looking good.

[B4nan]

and actually another one - do the same for the migrations-mongodb package, the code is unfortunately duplicated (otherwise we would have to have some internal packages, had it this way before and it was causing another sort of issues)

[codecov-commenter]

Codecov Report

Base: 99.77% // Head: 99.77% // No change to project coverage 👍

Coverage data is based on head (da5418b) compared to base (31b89b8).
Patch coverage: 100.00% of modified lines in pull request are covered.

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Additional details and impacted files

@@           Coverage Diff           @@
##           master    #4016   +/-   ##
=======================================
  Coverage   99.77%   99.77%           
=======================================
  Files         214      214           
  Lines       13736    13736           
  Branches     3216     3216           
=======================================
  Hits        13705    13705           
  Misses         29       29           
  Partials        2        2           

Impacted Files	Coverage Δ
packages/core/src/utils/Configuration.ts	100.00% <ø> (ø)
packages/migrations-mongodb/src/Migrator.ts	97.75% <ø> (ø)
packages/migrations/src/Migrator.ts	97.89% <100.00%> (ø)

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