[ADF-5170] [upload] not able to upload file/folder from external content service specfic path

[dhrn]

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/ADF-5170

What is the new behaviour?

done

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 #6256 into develop will increase coverage by 1.84%.
The diff coverage is 55.76%.

@@             Coverage Diff             @@
##           develop    #6256      +/-   ##
===========================================
+ Coverage    76.25%   78.09%   +1.84%     
===========================================
  Files          862      237     -625     
  Lines        19457     6577   -12880     
  Branches      3870     1281    -2589     
===========================================
- Hits         14836     5136    -9700     
+ Misses        3460     1049    -2411     
+ Partials      1161      392     -769     

Impacted Files	Coverage Δ
...lib/content-widget/attach-file-widget.component.ts	69.79% <45.45%> (-1.00%)	⬇️
...ontent-widget/attach-file-widget-dialog.service.ts	63.33% <47.36%> (-28.98%)	⬇️
...tent-widget/attach-file-widget-dialog.component.ts	82.14% <90.90%> (+4.36%)	⬆️
...src/lib/document-list/data/share-data-row.model.ts	73.68% <0.00%> (-2.64%)	⬇️
...ew/directives/card-view-content-proxy.directive.ts
...ts/src/lib/diagram/components/diagram.component.ts
...k-header/components/task-header-cloud.component.ts
...sights/src/lib/diagram/models/chart/chart.model.ts
.../directives/sidenav-layout-navigation.directive.ts
lib/core/form/services/form-rendering.service.ts
... and 619 more

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