[ACA-3643] - add completedBy filter on tasks

[SilviuCPopa]

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)
https://issues.alfresco.com/jira/browse/ACA-3627

What is the new behaviour?

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:

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[codecov-commenter]

Codecov Report

Merging #5924 into develop will increase coverage by 2.53%.
The diff coverage is 66.66%.

@@             Coverage Diff             @@
##           develop    #5924      +/-   ##
===========================================
+ Coverage    76.35%   78.89%   +2.53%     
===========================================
  Files          852      196     -656     
  Lines        19136     5282   -13854     
  Branches      3808     1083    -2725     
===========================================
- Hits         14612     4167   -10445     
+ Misses        3373      791    -2582     
+ Partials      1151      324     -827     

Impacted Files	Coverage Δ
...lib/task/task-filters/task-filters-cloud.module.ts	100.00% <ø> (ø)
.../task-list/components/task-list-cloud.component.ts	83.00% <ø> (ø)
...ers/components/edit-task-filter-cloud.component.ts	73.45% <50.00%> (-0.69%)	⬇️
...lib/task/task-filters/models/filter-cloud.model.ts	79.66% <100.00%> (+0.71%)	⬆️
...rc/lib/task/task-list/models/filter-cloud-model.ts	96.15% <100.00%> (+0.15%)	⬆️
...n-manager/components/inherited-button.directive.ts
lib/core/services/shared-links-api.service.ts
...b/content-services/src/lib/search/search.module.ts
lib/core/context-menu/context-menu.tokens.ts
...nts/raphael/icons/raphael-icon-script.component.ts
... and 652 more

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