Adding docker image build and push for loadgen

Signed-off-by: Anushka <anush159@in.ibm.com>

Author: anushka159-a

.github/workflows/docker-release.yml

@@ -80,6 +80,23 @@ jobs:
             PORTS=4001 2114 9001 2119 5001 2115 6001 2116 7001 2117
           cache-from: type=registry,ref=docker.io/${{ env.IMAGE_PREFIX }}/fabric-x-committer:buildcache
           cache-to: type=registry,ref=docker.io/${{  env.IMAGE_PREFIX  }}/fabric-x-committer:buildcache,mode=max
+        
+      - name: Build and Push Multi-Platform Docker Image for Loadgen
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          file: ./docker/images/release/Dockerfile
+          platforms: linux/amd64,linux/arm64,linux/s390x
+          push: true
+          tags: |
+            docker.io/${{ env.IMAGE_PREFIX }}/fabric-x-loadgen:latest
+            docker.io/${{ env.IMAGE_PREFIX }}/fabric-x-loadgen:${{ env.VERSION }}
+          build-args: |
+            BIN=loadgen
+            ARCHBIN_PATH=archbin
+            PORTS=4001 2114 9001 2119 5001 2115 6001 2116 7001 2117
+          cache-from: type=registry,ref=docker.io/${{ env.IMAGE_PREFIX }}/fabric-x-loadgen:buildcache
+          cache-to: type=registry,ref=docker.io/${{  env.IMAGE_PREFIX  }}/fabric-x-loadgen:buildcache,mode=max
 
       - name: Build and Push Multi-Platform Docker Image for Committer's Test Node
         uses: docker/build-push-action@v6