Onboarded flow-framework plugin to 2.12 manifest

Signed-off-by: Owais Kazi <[email protected]>

manifests/2.12.0/opensearch-2.12.0.yml

@@ -32,6 +32,15 @@ components:
     checks:
       - gradle:properties:version
       - gradle:dependencies:opensearch.version
+  - name: flow-framework
+    repository: https://github.com/opensearch-project/flow-framework.git
+    ref: 2.x
+    platforms:
+      - linux
+      - windows
+    checks:
+      - gradle:properties:version
+      - gradle:dependencies:opensearch.version
   - name: k-NN
     repository: https://github.com/opensearch-project/k-NN.git
     ref: 2.x