Robust handling of /usr/sbin/rm in Dockerfile

Change-Id: I4569ed4b3739332e745f85e681559857979a4f3a

Author: mattcary

Dockerfile

@@ -25,14 +25,14 @@ RUN GOARCH=$(echo $TARGETPLATFORM | cut -f2 -d '/') GCE_PD_CSI_STAGING_VERSION=$
 
 # MAD HACKS: Build a version first so we can take the scsi_id bin and put it somewhere else in our real build
 FROM k8s.gcr.io/build-image/debian-base:buster-v1.9.0 as mad-hack
-RUN ln -s /bin/rm /usr/sbin/rm \
+RUN ln -fs /bin/rm /usr/sbin/rm \
   && clean-install udev
 
 # Start from Kubernetes Debian base
 FROM k8s.gcr.io/build-image/debian-base:buster-v1.9.0
 COPY --from=builder /go/src/sigs.k8s.io/gcp-compute-persistent-disk-csi-driver/bin/gce-pd-csi-driver /gce-pd-csi-driver
 # Install necessary dependencies
-RUN ln -s /bin/rm /usr/sbin/rm \
+RUN ln -fs /bin/rm /usr/sbin/rm \
   && clean-install util-linux e2fsprogs mount ca-certificates udev xfsprogs
 COPY --from=mad-hack /lib/udev/scsi_id /lib/udev_containerized/scsi_id