tests: handle old containerd versions with v prefix

Handle cases where an older containerd version is prefixed with "v"
so that the operator still installs a newer version for them during
end-to-end tests

Signed-off-by: Chris Porter <porter@ibm.com>

tests/e2e/operator.sh

@@ -68,7 +68,8 @@ handle_older_containerd() {
         local version
         version=$(containerd -v | awk '{ print $3 }')
         echo "system's containerd version: $version"
-        if [[ "$version" =~ ^1.6 || "$version" =~ ^1.5 ]]; then
+        if [[ "$version" =~ ^1.6 || "$version" =~ ^1.5 \
+           || "$version" =~ ^v1.6 || "$version" =~ ^v1.5 ]]; then
                 echo "Old system's containerd ($version). Configuring the operator to install a newer one"
                 pushd "$project_dir" >/dev/null
                 for kfile in $(find config/ -name "kustomization.yaml" \