Mark mypy integration tests as flaky again in CI

[mschoettle]

Change Summary

The typechecking job fails due to an unused type: ignore[...]. See: https://github.com/pydantic/pydantic/actions/runs/11446111308/job/31844612840?pr=10676

This PR removes this comment.

Related issue number

Checklist

• The pull request title is a good summary of the changes - it will be used in the changelog
• Unit tests for the changes exist
• Tests pass on CI
• Documentation reflects the changes where applicable
• My PR is ready to review, please add a comment including the phrase "please review" to assign reviewers

Selected Reviewer: @sydney-runkle

[codspeed-hq]

CodSpeed Performance Report

Merging #10677 will not alter performance

_{Comparing mschoettle:fix-typechecking-ignore (c365a7e) with main (6681c00)}

Summary

✅ 44 untouched benchmarks

[github-actions]

Coverage report

This PR does not seem to contain any modification to coverable code.

[mschoettle]

please review

[Viicos]

Ok so turns out the test is still flaky. It was enabled today in #10671. Could you please instead re-add the same condition here? I'll debug in a separate PR.

[mschoettle]

@Viicos Okay, that explains why it suddenly appeared again. Changed as requested.

[Viicos]

Thanks!