Update and add translations for de_DE

[gamsterx]

PR Checklist

Please check if your PR fulfills the following requirements:

• The commit message follows our guidelines: https://github.com/NG-ZORRO/ng-zorro-antd/blob/master/CONTRIBUTING.md#commit
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

[ ] Bugfix
[ ] Feature
[ ] Code style update (formatting, local variables)
[ ] Refactoring (no functional changes, no api changes)
[ ] Build related changes
[ ] CI related changes
[ ] Documentation content changes
[ ] Application (the showcase website) / infrastructure changes
[x] Other... Please describe: i18n translations added and updated (de_DE)

What is the current behavior?

Console warning "Missing translations for "Text" in language "de".You can use
NzI18nService.setLocale" as a temporary fix. Welcome to submit a pull request to help us optimize the translations!"

Issue Number: N/A

What is the new behavior?

Translations added and updated

Does this PR introduce a breaking change?

[ ] Yes
[x] No

[netlify]

Deploy preview for ng-zorro-master ready!

Built with commit 87664d9

https://deploy-preview-4239--ng-zorro-master.netlify.com

[codecov]

Codecov Report

Merging #4239 into master will decrease coverage by <.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #4239      +/-   ##
==========================================
- Coverage   92.31%   92.31%   -0.01%     
==========================================
  Files         519      519              
  Lines       10963    10963              
  Branches     1984     1984              
==========================================
- Hits        10121    10120       -1     
  Misses        419      419              
- Partials      423      424       +1

Impacted Files	Coverage Δ
components/time-picker/time-holder.ts	95.61% <0%> (-0.88%)	⬇️

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[wzhudev]

Danke! Thank you for submitting a PR.

Please change your commit message to meet our committing guideline. https://github.com/NG-ZORRO/ng-zorro-antd/blob/master/CONTRIBUTING.md#commit-message-format

[wzhudev]

LGTM