Add Zuul CI for container builds and functional tests

Replace the stale stf-crc-jobs template with a content-provider job
that builds the sg-core container image and runs it through the
telemetry functional test pipeline. Add a Makefile with docker-build
and docker-push targets matching the operator convention.

Generated-By: Claude-Code claude-opus-4-6

Author: vyzigold

.zuul.yaml

@@ -1,5 +1,25 @@
 ---
+- job:
+    name: sg-core-content-provider
+    parent: telemetry-container-image-content-provider
+    description: |
+      Build sg-core container image from the current change.
+    required-projects:
+      - name: openstack-k8s-operators/sg-core
+    vars:
+      container_build_src: "{{ ansible_user_dir }}/src/github.com/openstack-k8s-operators/sg-core"
+      container_build_image_name: sg-core
+      container_update_var_name: cifmw_update_containers_ceilometersgcoreImage
+
 - project:
     name: openstack-k8s-operators/sg-core
-    templates:
-      - stf-crc-jobs
+    github-check:
+      jobs:
+        - sg-core-content-provider
+        - telemetry-openstack-meta-content-provider-master:
+            override-checkout: main
+        - functional-tests-osp18:
+            override-checkout: master
+            dependencies:
+              - telemetry-openstack-meta-content-provider-master
+              - sg-core-content-provider

Makefile

@@ -0,0 +1,9 @@
+IMG ?= quay.io/openstack-k8s-operators/sg-core:latest
+
+.PHONY: docker-build
+docker-build: ## Build container image
+	podman build -t ${IMG} -f build/Dockerfile .
+
+.PHONY: docker-push
+docker-push: ## Push container image
+	podman push ${IMG}