build: use multiScm for Kokoro release builds (#294)

Source-Link: googleapis/synthtool@0da1658
Post-Processor: gcr.io/cloud-devrel-public-resources/owlbot-python:latest@sha256:5cddfe2fb5019bbf78335bc55f15bc13e18354a56b3ff46e1834f8e540807f05

Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>

Author: gcf-owl-bot[bot]

bigquery/python-db-dtypes-pandas/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", "3.8", "3.9", "3.10", "3.11", "3.12"]
+ALL_VERSIONS = ["3.7", "3.8", "3.9", "3.10", "3.11", "3.12", "3.13"]
 
 # Any default versions that should be ignored.
 IGNORED_VERSIONS = TEST_CONFIG["ignored_versions"]