chore: require samples checks (#51)

Co-authored-by: Averi Kitsch <akitsch@google.com>
Co-authored-by: gcf-merge-on-green[bot] <60162190+gcf-merge-on-green[bot]@users.noreply.github.com>

packages/google-cloud-tasks/.github/sync-repo-settings.yaml

@@ -0,0 +1,13 @@
+# https://github.com/googleapis/repo-automation-bots/tree/master/packages/sync-repo-settings
+# Rules for master branch protection
+branchProtectionRules:
+# Identifies the protection rule pattern. Name of the branch to be protected.
+# Defaults to `master`
+- pattern: master
+  requiredStatusCheckContexts:
+    - 'Kokoro'
+    - 'cla/google'
+    - 'Samples - Lint'
+    - 'Samples - Python 3.6'
+    - 'Samples - Python 3.7'
+    - 'Samples - Python 3.8'