German - translation for TESTING -> New ... pages

[kiwitcms-bot]

Kiwi TCMS needs help translating the following pages into German where they don't contain translated strings:

• All menu items and pages under the TESTING menu
• New TestRun page which can be accessed as follows:
  • Open a test plan page (doesn't matter which one)
  • From the horizontal menu in the middle of the page select 2nd button (Runs)
  • then select Add new Run

Translation how-to:
https://kiwitcms.readthedocs.io/en/latest/contribution.html#translation

Definition of Done:

• All strings available for translation in these pages have been translated in the target language
• @kiwitcms-bot will automatically open/amend pull request(s) with new translations

This issue is part of Kiwi TCMS open source bounty program. For more information see the link(s) in bounty-program milestone

[atodorov]

A few translations via #1536 but generally still TODO

[atodorov]

Completed via #1679