Move bazel/utils.bzl into api/bazel
The api/... subtree depends on utils.bzl, but it is stored in //bazel,
not //api/bazel. When the api sub-tree is exported as
"data-plane-api", the resulting repository is not buildable.
This attempts to fix that by changing the canonical location of
utils.bzl and updating the references to it.
Signed-off-by: Ryan Anderson <ryan@michonline.com>
Mirrored from https://github.com/envoyproxy/envoy @ 35ef2c4eeac8e930e3c00e40baaea5271590db41
data-plane-api(Azure Pipelines)