Add sqlcommenter option to jdbc metadata

Author: laurit

instrumentation/jdbc/metadata.yaml

@@ -20,6 +20,14 @@ configurations:
     description: Enables experimental instrumentation to create spans for COMMIT and ROLLBACK operations.
     type: boolean
     default: false
+  - name: otel.instrumentation.jdbc.experimental.sqlcommenter.enabled
+    description: >
+      Enables augmenting queries with a comment containing the tracing information. See
+      [sqlcommenter](https://google.github.io/sqlcommenter/) for more info. WARNING: augmenting
+      queries with tracing context will make query texts unique, which may have adverse impact on
+      database performance. Consult with database experts before enabling.
+    type: boolean
+    default: false
   - name: otel.instrumentation.common.peer-service-mapping
     description: Used to specify a mapping from host names or IP addresses to peer services.
     type: map