Resolve mypy errors on appflow

[eladkal]

Body

Following #42954 (comment) and #43436 we need to fix the issue with mypy-boto3-appflow and remove the type ignores.

The task:

1. Bump to mypy-boto3-appflo>=1.35.39
2. Apply the needed fixes to appflow code to make mypy happy without using # type: ignore[arg-type]

Committer

• I acknowledge that I am a maintainer/committer of the Apache Airflow project.

[jx2lee]

@eladkal Can i take this issue? assign to me, please 🚀