fix: remove both short and fully-qualified Docker image names before building

BuildKit uses fully-qualified image names (docker.io/library/...) during the
export phase, which was causing 'already exists' errors even after removing
the short image name. Now both name formats are removed to ensure clean builds.

Author: josecelano

packages/dependency-installer/tests/containers/image_builder.rs

@@ -75,15 +75,24 @@ impl ImageBuilder {
 
         info!(image = full_image_name, "Building Docker image...");
 
-        // Remove any stale/corrupt image that might exist but wasn't detected
-        // This fixes CI issues where Docker BuildKit reports "already exists" during export
+        // Remove any stale/corrupt image that might exist but wasn't detected.
+        // This fixes CI issues where Docker BuildKit reports "already exists" during export.
+        // We remove both the short name and the fully-qualified name that BuildKit uses.
         drop(
             Command::new("docker")
                 .arg("rmi")
                 .arg("-f")
                 .arg(&full_image_name)
                 .output(), // Ignore errors - image might not exist
         );
+        let fq_image_name = format!("docker.io/library/{full_image_name}");
+        drop(
+            Command::new("docker")
+                .arg("rmi")
+                .arg("-f")
+                .arg(&fq_image_name)
+                .output(), // Ignore errors - image might not exist
+        );
 
         // Build the image with --force-rm to clean up intermediate containers
         let output = Command::new("docker")

src/testing/e2e/containers/image_builder.rs

@@ -305,11 +305,18 @@ impl ContainerImageBuilder {
 
         // In CI environments, Docker `BuildKit` may have stale tags or cache conflicts.
         // Force remove any existing image before building to ensure a clean build state.
+        // We remove both the short name and the fully-qualified name that BuildKit uses.
         drop(
             Command::new("docker")
                 .args(["rmi", "-f", &image_tag])
                 .output(),
         );
+        let fq_image_tag = format!("docker.io/library/{image_tag}");
+        drop(
+            Command::new("docker")
+                .args(["rmi", "-f", &fq_image_tag])
+                .output(),
+        );
 
         info!(
             image_name = %image_name,