[ACA-3286] User gets error when removing the attached file

[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-3286

What is the new behaviour?

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

• Yes
• x ] 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 #5744 into develop will decrease coverage by 0.01%.
The diff coverage is 0.00%.

@@             Coverage Diff             @@
##           develop    #5744      +/-   ##
===========================================
- Coverage    83.75%   83.73%   -0.02%     
===========================================
  Files          943      943              
  Lines        26792    26793       +1     
  Branches      3770     3770              
===========================================
- Hits         22439    22435       -4     
- Misses        3230     3234       +4     
- Partials      1123     1124       +1     

Impacted Files	Coverage Δ
...form/components/form-field/form-field.component.ts	61.76% <0.00%> (-0.93%)	⬇️
...ponents/widgets/attach-file/upload-cloud.widget.ts	77.94% <0.00%> (ø)
...t/components/process-instance-details.component.ts	77.35% <0.00%> (-7.55%)	⬇️

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