[ACA-3252] Content Metadata - Use the translation key

[mauriziovitale]

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)
Value not translated

What is the new behaviour?
Value should be translated

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 #5737 into develop will increase coverage by 2.41%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           develop    #5737      +/-   ##
===========================================
+ Coverage    83.73%   86.15%   +2.41%     
===========================================
  Files          943      173     -770     
  Lines        26776     5264   -21512     
  Branches      3767      748    -3019     
===========================================
- Hits         22421     4535   -17886     
+ Misses        3232      498    -2734     
+ Partials      1123      231     -892     

Impacted Files	Coverage Δ
lib/core/app-config/app-config.service.ts
...ons/src/lib/services/component-register.service.ts
lib/core/viewer/services/view-util.service.ts
...re/viewer/components/pdf-viewer-password-dialog.ts
lib/extensions/src/lib/config/extension-utils.ts
.../directives/check-allowable-operation.directive.ts
...m/components/widgets/date-time/date-time.widget.ts
lib/core/models/product-version.model.ts
...datatable/directives/loading-template.directive.ts
lib/core/models/identity-role.model.ts
... and 760 more

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