chore(.github): add crwilcox as codeowner (#3594)

Add crwilcox as codeowner and assignee for firestore, datastore,
and bigtable.

Author: tritone

.github/CODEOWNERS

@@ -1,10 +1,10 @@
 # Default owner for all directories not owned by others
 *                   @googleapis/yoshi-go-admins
 
-/bigtable/          @tritone @googleapis/yoshi-go-admins
+/bigtable/          @crwilcox @tritone @googleapis/yoshi-go-admins
 /bigquery/          @googleapis/api-bigquery @googleapis/yoshi-go-admins
-/datastore/         @tritone @googleapis/yoshi-go-admins
-/firestore/         @tritone @googleapis/yoshi-go-admins
+/datastore/         @crwilcox @tritone @googleapis/yoshi-go-admins
+/firestore/         @crwilcox @tritone @googleapis/yoshi-go-admins
 /pubsub/            @googleapis/api-pubsub @googleapis/yoshi-go-admins
 /pubsublite/        @googleapis/api-pubsub @googleapis/yoshi-go-admins
 /spanner/           @skuruppu @googleapis/yoshi-go-admins

.github/blunderbuss.yml

@@ -3,6 +3,9 @@ assign_issues_by:
   - 'api: bigtable'
   - 'api: datastore'
   - 'api: firestore'
+  to:
+  - crwilcox
+- labels:
   - 'api: storage'
   to:
   - tritone