MAINT: make send_mail in crawler static

Summary

I want to reuse the send_mail function. There is no reason not to have it static.

Test Environment

pipeline

Check List for the Author

Please, prepare your MR for a review. Be sure to write a summary and a focus and create gitlab comments for the reviewer. They should guide the reviewer through the changes, explain your changes and also point out open questions. For further good practices have a look at our review guidelines

• All automated tests pass
• Reference related issues https://gitlab.indiscale.com/caosdb/customers/leibniz-zmt/management/-/issues/76
• Up-to-date CHANGELOG.md (or not necessary)
• Annotations in code (Gitlab comments)
  • Intent of new code
  • Problems with old code
  • Why this implementation?

Check List for the Reviewer

• I understand the intent of this MR
• All automated tests pass
• Up-to-date CHANGELOG.md (or not necessary)
• The test environment setup works and the intended behavior is reproducible in the test environment
• In-code documentation and comments are up-to-date.
• Check: Are there specifications? Are they satisfied?

For further good practices have a look at our review guidelines.

assigned to @henrik

changed the description

added 2 commits

• aa5b6696 - MAINT: update docker image
• ec01f29b - Merge branch 'f-pipeline' into f-sendmail

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added 1 commit

• 67473694 - up

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added 2 commits

• 721e943a - FIX: names of docker containers
• 62d9b98f - Merge branch 'f-pipeline' into f-sendmail

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added 4 commits

• 1233969c - MAINT: make save_form a staticmethod
• ecc6e45f - Merge branch 'f-pipeline' into f-save-form
• fad5dc48 - Merge branch 'f-pipeline' into f-save-form
• 9e522b1a - Merge branch 'f-save-form' into tmp

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added 4 commits

• 9e522b1a...9a1f3e3b - 3 commits from branch dev
• a2207fd5 - Merge branch 'dev' into f-sendmail

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requested review from @florian

marked the checklist item I understand the intent of this MR as completed

marked the checklist item All automated tests pass as completed

marked the checklist item Up-to-date CHANGELOG.md (or not necessary) as completed

marked the checklist item The test environment setup works and the intended behavior is reproducible in the test as completed

marked the checklist item In-code documentation and comments are up-to-date. as completed

approved this merge request

enabled an automatic merge when the pipeline for a2207fd5 succeeds

merged

mentioned in commit 6de42175