[ADF-5213] Metadata - select list filter documentation

[pionnegru]

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)
ADF-5213

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:

[codecov-commenter]

Codecov Report

Merging #5965 into develop will increase coverage by 1.79%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           develop    #5965      +/-   ##
===========================================
+ Coverage    76.39%   78.18%   +1.79%     
===========================================
  Files          845      142     -703     
  Lines        18722     3920   -14802     
  Branches      3696      780    -2916     
===========================================
- Hits         14303     3065   -11238     
+ Misses        3301      602    -2699     
+ Partials      1118      253     -865     

Impacted Files	Coverage Δ
...rocess/components/start-process-cloud.component.ts
...nents/raphael/icons/raphael-icon-send.component.ts
...tart-process/models/process-payload-cloud.model.ts
.../core/card-view/models/card-view-baseitem.model.ts
lib/core/form/services/ecm-model.service.ts
...am/components/swimlanes/diagram-lanes.component.ts
...vities/diagram-container-service-task.component.ts
...ocess-filters/models/process-filter-cloud.model.ts
...idgets/dynamic-table/dynamic-table.widget.model.ts
lib/core/utils/object-utils.ts
... and 694 more

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