i18n: Fixed all German translation handlebar errors

[hardikbhatia777]

Proposed changes (including videos or screenshots)

There are a few incorrect translations in the Deustch (German) i18n files which look like this __Datum__, when they should look like this {{date}}. A similar issue was recently resolved (#30740 ) which occurred due to the same thing.

An example of this (picked from the issue mentioned above):

This PR aims to clean up all remaining instances of mistranslated handlebar expressions.

Issue(s)

Steps to test or reproduce

Further comments

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Latest commit: 107f076

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[codecov]

Codecov Report

Merging #31139 (107f076) into develop (58cbc51) will decrease coverage by 8.43%.
The diff coverage is n/a.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop   #31139      +/-   ##
===========================================
- Coverage    57.18%   48.76%   -8.43%     
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  Files          880     3279    +2399     
  Lines        19925    79997   +60072     
  Branches      3719    16015   +12296     
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+ Hits         11395    39010   +27615     
- Misses        7841    36407   +28566     
- Partials       689     4580    +3891     

Flag	Coverage Δ
e2e	51.44% <ø> (+9.07%)	⬆️
e2e-api	40.80% <ø> (?)
unit	76.63% <ø> (ø)

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