Cannot mock some models with mockito

[bpauli]

• move ComponentDataModelSerializer to an exported package as it is used by the Component interface

fixes #1834

Q	A
Fixed Issues?	Fixes #1834
Patch: Bug Fix?	👍
Minor: New Feature?
Major: Breaking Change?
Tests Added + Pass?	Yes
Documentation Provided	Yes (code comments and or markdown)
Any Dependency Changes?
License	Apache License, Version 2.0

[codecov]

Codecov Report

Merging #1891 (8fd5b90) into development (d95506a) will not change coverage.
The diff coverage is n/a.

@@              Coverage Diff               @@
##             development    #1891   +/-   ##
==============================================
  Coverage          86.64%   86.64%           
  Complexity          2293     2293           
==============================================
  Files                210      210           
  Lines               6103     6103           
  Branches             925      925           
==============================================
  Hits                5288     5288           
  Misses               332      332           
  Partials             483      483           

Impacted Files	Coverage Δ
...adobe/cq/wcm/core/components/models/Component.java	100.00% <ø> (ø)
...atalayer/jackson/ComponentDataModelSerializer.java	100.00% <ø> (ø)
.../core/components/models/embeddable/Embeddable.java	100.00% <ø> (ø)

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[sonarcloud]

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