Rollback Page object resolving: inject empty regions to the page obje…

[ashklianko]

…ct when returning content #10209

[codecov]

Codecov Report

Patch coverage: 89.47% and project coverage change: -0.07 ⚠️

Comparison is base (c1883c7) 84.34% compared to head (20d2d7e) 84.27%.

Additional details and impacted files

@@             Coverage Diff              @@
##               7.13   #10211      +/-   ##
============================================
- Coverage     84.34%   84.27%   -0.07%     
+ Complexity    19418    19357      -61     
============================================
  Files          2595     2595              
  Lines         67678    67691      +13     
  Branches       5390     5382       -8     
============================================
- Hits          57083    57048      -35     
- Misses         7982     8024      +42     
- Partials       2613     2619       +6     

Impacted Files	Coverage Δ
.../xp/core/impl/content/ReprocessContentCommand.java	0.00% <0.00%> (ø)
.../impl/content/serializer/RegionDataSerializer.java	100.00% <ø> (ø)
...al/impl/handler/render/ComponentHandlerWorker.java	63.63% <0.00%> (-27.28%)	⬇️
...portal/impl/handler/render/PageResolverResult.java	100.00% <ø> (+11.11%)	⬆️
.../content/page/region/GetComponentByKeyCommand.java	77.77% <33.33%> (-15.08%)	⬇️
.../portal/impl/handler/render/PageHandlerWorker.java	73.17% <33.33%> (-4.33%)	⬇️
.../postprocess/instruction/ComponentInstruction.java	47.16% <73.33%> (-41.86%)	⬇️
...tent/serializer/LayoutComponentDataSerializer.java	84.61% <87.50%> (-7.70%)	⬇️
...nonic/xp/core/impl/content/ContentServiceImpl.java	77.92% <93.33%> (+0.28%)	⬆️
...ic/xp/core/impl/content/ContentNodeTranslator.java	91.66% <100.00%> (ø)
... and 17 more

... and 3 files with indirect coverage changes

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