chore: refactor CODEOWNERS (googleapis#13362)

This PR makes a couple of minor changes to the CODEOWNERS structure
* widens @googleapis/cloud-sdk-librarian-team access to match
@googleapis/cloud-sdk-go-eng
* removes the release-please manifest entry
* makes library statefile unowned to reduce friction for librarian
operations

Related: internal b/460809672

Author: shollyman

.github/CODEOWNERS

@@ -1,29 +1,34 @@
 # Default owner for all directories not owned by others
+# The cloud-sdk-go-eng team are the effective repo maintainers, but automatic
+# generation/releasing PRs are in the purview of the librarian team.
+*                       @googleapis/cloud-sdk-librarian-team @googleapis/cloud-sdk-go-eng
 
-*                       @googleapis/cloud-sdk-librarian-team @googleapis/cloud-sdk-go-eng # Librarian team access for merging Librarian PRs
-
-/ai/                    @googleapis/go-vertexai @googleapis/cloud-sdk-go-eng
+/ai/                    @googleapis/go-vertexai @googleapis/cloud-sdk-go-eng @googleapis/cloud-sdk-librarian-team
 /aiplatform/            @googleapis/go-vertexai @googleapis/cloud-sdk-go-eng @googleapis/cloud-sdk-librarian-team
-/bigtable/              @googleapis/cloud-native-db-dpes @googleapis/api-bigtable-partners @googleapis/api-bigtable @googleapis/cloud-sdk-go-eng
-/bigtable/cmd/cbt       @igorbernstein2 @googleapis/cloud-native-db-dpes @googleapis/api-bigtable-partners @googleapis/api-bigtable @googleapis/cloud-sdk-go-eng
-/bigtable/cmd/emulator  @igorbernstein2 @googleapis/cloud-native-db-dpes @googleapis/api-bigtable-partners @googleapis/api-bigtable @googleapis/cloud-sdk-go-eng
-/bigtable/bttest        @igorbernstein2 @googleapis/cloud-native-db-dpes @googleapis/api-bigtable-partners @googleapis/api-bigtable @googleapis/cloud-sdk-go-eng
-/bigquery/              @googleapis/api-bigquery @googleapis/cloud-sdk-go-eng
-/datastore/             @googleapis/cloud-native-db-dpes @googleapis/api-firestore-partners @googleapis/cloud-sdk-go-eng
-/firestore/             @googleapis/cloud-native-db-dpes @googleapis/api-firestore-partners @googleapis/cloud-sdk-go-eng
-/pubsub/                @googleapis/api-pubsub @googleapis/cloud-sdk-go-eng @googleapis/cloud-native-db-dpes
-/pubsublite/            @googleapis/api-pubsub @googleapis/cloud-sdk-go-eng
-/spanner/               @googleapis/spanner-client-libraries-go @googleapis/cloud-sdk-go-eng
-/storage/               @googleapis/gcs-sdk-team @googleapis/cloud-sdk-go-eng
-/httpreplay/            @googleapis/gcs-sdk-team @googleapis/cloud-sdk-go-eng
-/errorreporting/        @googleapis/api-logging @googleapis/api-logging-partners @googleapis/cloud-sdk-go-eng
-/logging/               @googleapis/api-logging @googleapis/api-logging-partners @googleapis/cloud-sdk-go-eng
-/profiler/              @googleapis/api-profiler @googleapis/cloud-sdk-go-eng
-/vertexai/              @googleapis/go-vertexai @googleapis/cloud-sdk-go-eng
-/internal/protoveneer/  @googleapis/cloud-sdk-go-eng @jba
+/bigtable/              @googleapis/cloud-native-db-dpes @googleapis/api-bigtable-partners @googleapis/api-bigtable @googleapis/cloud-sdk-go-eng @googleapis/cloud-sdk-librarian-team
+/bigtable/cmd/cbt       @igorbernstein2 @googleapis/cloud-native-db-dpes @googleapis/api-bigtable-partners @googleapis/api-bigtable @googleapis/cloud-sdk-go-eng @googleapis/cloud-sdk-librarian-team
+/bigtable/cmd/emulator  @igorbernstein2 @googleapis/cloud-native-db-dpes @googleapis/api-bigtable-partners @googleapis/api-bigtable @googleapis/cloud-sdk-go-eng @googleapis/cloud-sdk-librarian-team
+/bigtable/bttest        @igorbernstein2 @googleapis/cloud-native-db-dpes @googleapis/api-bigtable-partners @googleapis/api-bigtable @googleapis/cloud-sdk-go-eng @googleapis/cloud-sdk-librarian-team
+/bigquery/              @googleapis/api-bigquery @googleapis/cloud-sdk-go-eng @googleapis/cloud-sdk-librarian-team
+/datastore/             @googleapis/cloud-native-db-dpes @googleapis/api-firestore-partners @googleapis/cloud-sdk-go-eng @googleapis/cloud-sdk-librarian-team
+/firestore/             @googleapis/cloud-native-db-dpes @googleapis/api-firestore-partners @googleapis/cloud-sdk-go-eng @googleapis/cloud-sdk-librarian-team
+/pubsub/                @googleapis/api-pubsub @googleapis/cloud-sdk-go-eng @googleapis/cloud-sdk-librarian-team @googleapis/cloud-native-db-dpes
+/pubsublite/            @googleapis/api-pubsub @googleapis/cloud-sdk-go-eng @googleapis/cloud-sdk-librarian-team
+/spanner/               @googleapis/spanner-client-libraries-go @googleapis/cloud-sdk-go-eng @googleapis/cloud-sdk-librarian-team
+/storage/               @googleapis/gcs-sdk-team @googleapis/cloud-sdk-go-eng @googleapis/cloud-sdk-librarian-team
+/httpreplay/            @googleapis/gcs-sdk-team @googleapis/cloud-sdk-go-eng @googleapis/cloud-sdk-librarian-team
+/errorreporting/        @googleapis/api-logging @googleapis/api-logging-partners @googleapis/cloud-sdk-go-eng @googleapis/cloud-sdk-librarian-team
+/logging/               @googleapis/api-logging @googleapis/api-logging-partners @googleapis/cloud-sdk-go-eng @googleapis/cloud-sdk-librarian-team
+/profiler/              @googleapis/api-profiler @googleapis/cloud-sdk-go-eng @googleapis/cloud-sdk-librarian-team
+/vertexai/              @googleapis/go-vertexai @googleapis/cloud-sdk-go-eng @googleapis/cloud-sdk-librarian-team
+/internal/protoveneer/  @googleapis/cloud-sdk-go-eng @googleapis/cloud-sdk-librarian-team @jba
+
+
+# We mark the librarian state file as unowned to avoid gatekeeping librarian operations on 
+# a single owner.  This allows multiple teams to interact with librarian operations that cause
+# changes to librarian state.
+/.librarian/state.yaml
 
-# individual release versions manifest is unowned (to avoid notifying every team)
-.release-please-manifest-individual.json
 # Owned by all
 go.work
 go.work.sum