fix: cli prompt termination exit code

Signed-off-by: Alano Terblanche <18033717+Benehiko@users.noreply.github.com>

cli/command/builder/client_test.go

@@ -0,0 +1,20 @@
+package builder
+
+import (
+	"context"
+
+	"github.com/docker/docker/api/types"
+	"github.com/docker/docker/client"
+)
+
+type fakeClient struct {
+	client.Client
+	builderPruneFunc func(ctx context.Context, opts types.BuildCachePruneOptions) (*types.BuildCachePruneReport, error)
+}
+
+func (c *fakeClient) BuildCachePrune(ctx context.Context, opts types.BuildCachePruneOptions) (*types.BuildCachePruneReport, error) {
+	if c.builderPruneFunc != nil {
+		return c.builderPruneFunc(ctx, opts)
+	}
+	return nil, nil
+}