ci: group job

Signed-off-by: CrazyMax <crazy-max@users.noreply.github.com>

test/group/Dockerfile

@@ -0,0 +1,7 @@
+# syntax=docker/dockerfile:1
+
+FROM busybox AS t1
+RUN echo "Hello t1"
+
+FROM busybox AS t2
+RUN echo "Hello t2"

test/group/docker-bake.hcl

@@ -0,0 +1,11 @@
+group "default" {
+  targets = ["t1", "t2"]
+}
+
+target "t1" {
+  target = "t1"
+}
+
+target "t2" {
+  target = "t2"
+}