updates lowest version for system test and owlbot

Author: chalmerlowe

noxfile.py

@@ -75,7 +75,7 @@
     ],
 }
 
-SYSTEM_TEST_PYTHON_VERSIONS: List[str] = ["3.12", "3.13"]
+SYSTEM_TEST_PYTHON_VERSIONS: List[str] = ["3.9", "3.12", "3.13"]
 SYSTEM_TEST_STANDARD_DEPENDENCIES: List[str] = [
     "mock",
     "pytest",

owlbot.py

@@ -36,7 +36,7 @@
 }
 templated_files = common.py_library(
     unit_test_python_versions=["3.9", "3.10", "3.11", "3.12", "3.13"],
-    system_test_python_versions=["3.12", "3.13"],
+    system_test_python_versions=["3.9", "3.12", "3.13"],
     cov_level=100,
     unit_test_extras=extras,
     unit_test_extras_by_python=extras_by_python,

samples/snippets/noxfile.py

@@ -89,7 +89,7 @@ def get_pytest_env_vars() -> Dict[str, str]:
 
 # DO NOT EDIT - automatically generated.
 # All versions used to test samples.
-ALL_VERSIONS = ["3.7", "3.9", "3.10", "3.11", "3.12", "3.13"]
+ALL_VERSIONS = ["3.9", "3.10", "3.11", "3.12", "3.13"]
 
 # Any default versions that should be ignored.
 IGNORED_VERSIONS = TEST_CONFIG["ignored_versions"]