tests: python 3.10 is showing up in cloudimages

[blackboxsw]

Additional Context

Fixes failures like:

>       assert re.match(r"3.\d\.\d", v1_data["python_version"])
E       AssertionError: assert None
E        +  where None = <function match at 0x7f1206b7bc80>('3.\\d\\.\\d', '3.10.3')

https://jenkins.ubuntu.com/server/view/cloud-init/job/cloud-init-integration-jammy-gce/2/testReport/tests.integration_tests.modules.test_combined/TestCombined/test_instance_json_gce/

Test Steps

Checklist:

• My code follows the process laid out in the documentation
• I have updated or added any unit tests accordingly
• I have updated or added any documentation accordingly

[TheRealFalcon]

nit: might as well throw a plus on the last digit too, right?