[ACA-3804] Add All option in process definition name filter dropdown

[mcchrys]

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-3804

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 #5937 into develop will increase coverage by 2.06%.
The diff coverage is 100.00%.

@@             Coverage Diff             @@
##           develop    #5937      +/-   ##
===========================================
+ Coverage    76.08%   78.14%   +2.06%     
===========================================
  Files          843      334     -509     
  Lines        18739     8940    -9799     
  Branches      3683     1778    -1905     
===========================================
- Hits         14257     6986    -7271     
+ Misses        3374     1405    -1969     
+ Partials      1108      549     -559     

Impacted Files	Coverage Δ
.../components/edit-process-filter-cloud.component.ts	73.54% <100.00%> (+0.42%)	⬆️
.../lib/task-list/components/attach-form.component.ts	35.89% <0.00%> (-15.39%)	⬇️
.../lib/search/search-header-query-builder.service.ts	76.92% <0.00%> (-6.42%)	⬇️
...vices/src/lib/search/base-query-builder.service.ts	85.82% <0.00%> (-0.55%)	⬇️
.../attach-file/attach-file-cloud-widget.component.ts	94.11% <0.00%> (ø)
...nents/raphael/icons/raphael-icon-user.component.ts
lib/core/language-menu/language-menu.module.ts
...am/components/activities/diagram-task.component.ts
...server-settings/about-server-settings.component.ts
lib/extensions/src/test.ts
... and 510 more

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