[AAE-4241] Populate date and datetime widgets on retrieve metadata

[pmartinezga]

Please check if the PR fulfills these requirements

• The commit message follows our guidelines
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

What kind of change does this PR introduce? (check one with "x")

• Bugfix
• Feature
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• Build related changes
• Documentation
• Other... Please describe:

What is the current behaviour? (You can also link to an open issue here)
When retrieving the metadata from a node in a content model form, the date and datetime fields are not populated with the corresponding property value.

What is the new behaviour?
The date and datetime widgets display the value of the corresponding property in the content model form

Does this PR introduce a breaking change? (check one with "x")

• Yes
• No

If this PR contains a breaking change, please describe the impact and migration path for existing applications: ...

Other information:

[codecov-io]

Codecov Report

Merging #6412 (8bbbd4a) into develop (13faf4e) will increase coverage by 0.14%.
The diff coverage is 85.71%.

@@             Coverage Diff             @@
##           develop    #6412      +/-   ##
===========================================
+ Coverage    76.25%   76.40%   +0.14%     
===========================================
  Files          868      859       -9     
  Lines        19623    19352     -271     
  Branches      3907     3834      -73     
===========================================
- Hits         14964    14786     -178     
+ Misses        3463     3391      -72     
+ Partials      1196     1175      -21     

Impacted Files	Coverage Δ
...k-filters/base-edit-task-filter-cloud.component.ts	72.00% <ø> (ø)
...m/components/widgets/date-time/date-time.widget.ts	73.07% <33.33%> (-6.09%)	⬇️
.../lib/app/components/app-details-cloud.component.ts	100.00% <100.00%> (ø)
...src/lib/app/components/app-list-cloud.component.ts	100.00% <100.00%> (ø)
...-services-cloud/src/lib/app/mock/app-model.mock.ts	100.00% <100.00%> (ø)
...d/src/lib/app/models/application-instance.model.ts	100.00% <100.00%> (+60.00%)	⬆️
...src/lib/app/services/apps-process-cloud.service.ts	72.00% <100.00%> (-1.08%)	⬇️
.../form/components/widgets/date/date-cloud.widget.ts	82.14% <100.00%> (+1.37%)	⬆️
lib/core/services/upload.service.ts	85.47% <0.00%> (-3.36%)	⬇️
...lib/process-comments/process-comments.component.ts	61.53% <0.00%> (-2.57%)	⬇️
... and 10 more

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[eromano]

/rebase

[pmartinezga]

/rebase