chore(python): add .github/CODEOWNERS as a templated file (#159)

Source-Link: googleapis/synthtool@c5026b3
Post-Processor: gcr.io/cloud-devrel-public-resources/owlbot-python:latest@sha256:0e18b9475fbeb12d9ad4302283171edebb6baf2dfca1bd215ee3b34ed79d95d7

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

packages/google-cloud-trace/.github/.OwlBot.lock.yaml

@@ -1,3 +1,3 @@
 docker:
   image: gcr.io/cloud-devrel-public-resources/owlbot-python:latest
-  digest: sha256:4ee57a76a176ede9087c14330c625a71553cf9c72828b2c0ca12f5338171ba60
+  digest: sha256:0e18b9475fbeb12d9ad4302283171edebb6baf2dfca1bd215ee3b34ed79d95d7

packages/google-cloud-trace/.github/CODEOWNERS

@@ -3,9 +3,10 @@
 #
 # For syntax help see:
 # https://help.github.com/en/github/creating-cloning-and-archiving-repositories/about-code-owners#codeowners-syntax
+# Note: This file is autogenerated. To make changes to the codeowner team, please update .repo-metadata.json.
 
-# The @googleapis/yoshi-python is the default owner for changes in this repo
-*               @googleapis/yoshi-python
+# @googleapis/yoshi-python is the default owner for changes in this repo
+*     @googleapis/yoshi-python
 
-# The python-samples-reviewers team is the default owner for samples changes
-/samples/  @googleapis/python-samples-owners
+# @googleapis/python-samples-owners is the default owner for samples changes
+/samples/   @googleapis/python-samples-owners