Mvc\Model::snapshot data cast

[zsilbi]

Hello!

• Type: bug fix
• Link to issue: Model::hasChanged() and getChangedFields() return false values #14376

In raising this pull request, I confirm the following:

• I have read and understood the Contributing Guidelines
• I have checked that another pull request for this purpose does not exist
• I wrote some tests for this PR
• I have updated the relevant CHANGELOG
• I have created a PR for the documentation about this change

Small description of change:

When orm.cast_on_hydrate is on, I think Model::cloneResultMap() should save the casted values to the snapshot data.
If it's off, then Model::getChangedFields() should not use === to check if the field has changed.

Thanks,
zsilbi

[codecov]

Codecov Report

Merging #14377 into 4.0.x will decrease coverage by 0.13%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##            4.0.x   #14377      +/-   ##
==========================================
- Coverage   67.63%    67.5%   -0.14%     
==========================================
  Files         478      478              
  Lines      110989   110991       +2     
==========================================
- Hits        75069    74924     -145     
- Misses      35920    36067     +147