style(mypy): fix mypy warnings

[Lee-W]

On #1109, we're testing RC releases announced on airflow issue 31322. This PR fixes the mypy warnings on that branch

[codecov]

Codecov Report

Patch coverage: 100.00% and no project coverage change.

Comparison is base (34bc6d5) 98.57% compared to head (c710516) 98.57%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1112   +/-   ##
=======================================
  Coverage   98.57%   98.57%           
=======================================
  Files          90       90           
  Lines        5338     5339    +1     
=======================================
+ Hits         5262     5263    +1     
  Misses         76       76           

Impacted Files	Coverage Δ
...onomer/providers/amazon/aws/operators/sagemaker.py	100.00% <100.00%> (ø)
...nomer/providers/databricks/operators/databricks.py	100.00% <100.00%> (ø)
...nomer/providers/google/cloud/operators/bigquery.py	98.63% <100.00%> (+<0.01%)	⬆️
astronomer/providers/google/cloud/sensors/gcs.py	92.30% <100.00%> (ø)

☔ View full report in Codecov by Sentry.
📢 Do you have feedback about the report comment? Let us know in this issue.