Add postgres to Elastic Docker images

Author: girodav

.github/workflows/component_build-images-elastic.yml

@@ -108,6 +108,10 @@ jobs:
             tag_suffix: traceBasedTests
             context: ./
             setup-qemu: true
+          - file: ./src/postgres/Dockerfile
+            tag_suffix: postgresql
+            context: ./
+            setup-qemu: true
 
     steps:
       - uses: actions/checkout@v4