add codeowners for airbyte-maintainers group (#19683)

Author: cgardens

.github/CODEOWNERS

@@ -17,6 +17,19 @@
 /airbyte-protocol/ @airbytehq/protocol-reviewers
 /docs/understanding-airbyte/airbyte-protocol.md @airbytehq/protocol-reviewers
 
+# Airbyte Maintainers
+airbyte-server/src/main/java/io/airbyte/server/handlers/WebBackendConnectionsHandler.java @airbytehq/airbyte-maintainers
+airbyte-config/config-persistence/src/test/java/io/airbyte/config/persistence/BaseConfigDatabaseTest.java @airbytehq/airbyte-maintainers
+airbyte-commons/src/main/ @airbytehq/airbyte-maintainers
+airbyte-commons/src/main/java/io/airbyte/commons/json/JsonSchemas.java @airbytehq/airbyte-maintainers
+airbyte-commons/src/main/java/io/airbyte/commons/json/JsonPaths.java @airbytehq/airbyte-maintainers
+airbyte-commons/src/main/java/io/airbyte/commons/json/Jsons.java @airbytehq/airbyte-maintainers
+airbyte-config/config-persistence/src/main/java/io/airbyte/config/persistence/split_secrets/ @airbytehq/airbyte-maintainers
+airbyte-config/config-persistence/src/main/java/io/airbyte/config/persistence/SecretsRepositoryReader.java @airbytehq/airbyte-maintainers
+airbyte-config/config-persistence/src/main/java/io/airbyte/config/persistence/SecretsRepositoryWriter.java @airbytehq/airbyte-maintainers
+airbyte-config/config-persistence/src/main/java/io/airbyte/config/persistence/ConfigRepository.java @airbytehq/airbyte-maintainers
+*build.gradle @airbytehq/airbyte-maintainers
+
 # Normalization
 /airbyte-integrations/bases/base-normalization/ @airbytehq/normalization
 
@@ -47,4 +60,4 @@
 /airbyte-integrations/connectors/destination-postgres/ @airbytehq/jdbc-connectors
 /airbyte-integrations/connectors/destination-redshift/ @airbytehq/jdbc-connectors
 /airbyte-integrations/connectors/destination-rockset/ @airbytehq/jdbc-connectors
-/airbyte-integrations/connectors/source-snowflake/ @airbytehq/jdbc-connectors
+/airbyte-integrations/connectors/source-snowflake/ @airbytehq/jdbc-connectors