Add newline to test_requirement file and python version constraint on transitive dependancy

Author: papriwal

requirements/extras/test_requirements.txt

@@ -61,4 +61,5 @@ mypy-boto3-redshift-data==1.35.51
 mypy-boto3-s3==1.35.76
 mypy-extensions==1.0.0
 mypy==1.9.0
-google-re2<1.1.20250805
+# apache-airflow transitive dependancy
+google-re2<1.1.20250805; python_version < "3.10"