publish json schemas as a single URL

Signed-off-by: Chanwit Kaewkasi <chanwit@gmail.com>

This change publishes the auto-generated JSON schemas as a single URL,
so that it is consumable by a tool like VS Code.

The CRD generator creates 2 files, a tar.gz for Kubeval,
and another one is a JSON file. The JSON file is a combination of
all schemas, put under the "oneOf" operator.