Add Grafana access review connector support

Add Grafana as an access review connector-backed source.

This introduces a Grafana access-review driver, provider registration,
and connector settings for the Grafana base URL. It also wires the
new provider through GraphQL and access-review UI input mapping so
API-key connectors can be created from the product.

A connector_provider enum migration is included so Grafana can be
persisted in existing databases.

Signed-off-by: Cursor Agent <cursoragent@cursor.com>

Co-authored-by: Bryan FRIMIN <bryan@frimin.fr>

apps/console/src/pages/organizations/access-reviews/dialogs/AddAccessSourceDialog.tsx

@@ -113,6 +113,9 @@ function mapAPIKeyExtraSettingToField(
     case "GITHUB":
       if (settingKey === "organization") return "githubOrganization";
       break;
+    case "GRAFANA":
+      if (settingKey === "baseUrl") return "grafanaBaseUrl";
+      break;
     case "ONE_PASSWORD":
       if (settingKey === "scimBridgeUrl") return "onePasswordScimBridgeUrl";
       break;