chore: Update .repo-metadata.json and CODEOWNERS (#922)

* chore: update CODEOWNERS

update CODEOWNERS file to allow reviews from partner team

* Update .repo-metadata.json

* 🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

---------

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

Author: daniel-sanche

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

@@ -5,8 +5,8 @@
 # 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.
 
-# @googleapis/yoshi-python @googleapis/api-bigtable are the default owners for changes in this repo
-*     @googleapis/yoshi-python @googleapis/api-bigtable
+# @googleapis/yoshi-python @googleapis/api-bigtable @googleapis/api-bigtable-partners are the default owners for changes in this repo
+*     @googleapis/yoshi-python @googleapis/api-bigtable @googleapis/api-bigtable-partners
 
-# @googleapis/python-samples-reviewers @googleapis/api-bigtable are the default owners for samples changes
-/samples/   @googleapis/python-samples-reviewers @googleapis/api-bigtable
+# @googleapis/python-samples-reviewers @googleapis/api-bigtable @googleapis/api-bigtable-partners are the default owners for samples changes
+/samples/   @googleapis/python-samples-reviewers @googleapis/api-bigtable @googleapis/api-bigtable-partners

packages/google-cloud-bigtable/.repo-metadata.json

@@ -75,6 +75,6 @@
         }
     ],
     "default_version": "v2",
-    "codeowner_team": "@googleapis/api-bigtable",
+    "codeowner_team": "@googleapis/api-bigtable @googleapis/api-bigtable-partners",
     "api_shortname": "bigtable"
 }