Fix error handling in tkn_bundle_push

When `tkn bundle push` exits with code not equal to 0, due to `errexit`
being turned on (`set -e`) the script is terminated immediately without
retrying. This changes the logic so if the `tkn bundle push` succeeds
the retying while loop is stopped, i.e. the `&& break` branch is
executed. In case of errors the `&& break` branch is not executed and
the status of `tkn bundle push` is captured in the `status` variable,
the retrying `while` loop continues until `max_retries` is reached.

hack/build-and-push.sh

@@ -13,11 +13,8 @@ tkn_bundle_push() {
     local -r interval=${RETRY_INTERVAL:-5}
     local -r max_retries=5
     while true; do
-        tkn bundle push "$@"
+        tkn bundle push "$@" && break
         status=$?
-        if [ $status == 0 ]; then
-            break
-        fi
         ((retry+=1))
         if [ $retry -gt $max_retries ]; then
             return $status