Replace mongodb-runner with mongodb-memory-server

[mtrezza]

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New Feature / Enhancement Checklist

• [x] I am not disclosing a vulnerability.
• [x] I am not just asking a question.
• [x] I have searched through existing issues.

Current Limitation

Currently, we are using mongodb-runner to spin up MongoDB test DBs in CI.

There have been recent incidents, where the latest MongoDB version was not available via mongo-runner.

Feature / Enhancement Description

Switch to mongodb-memory-server.

Example Use Case

n/a

Alternatives / Workarounds

Keep excluding recent MongoDB versions from testing in the CI.

3rd Party References

n/a