can --post-renderer support assign the cmd args into executable ?

[tanguofu]

now helm --post-renderer only accept the executable in PATH;

but it is very necessary that the post-renderer-executable worked with some args ,for example change the docker.io registry into private docker registry when deploy the chart without internet access.

can helm can add args to assign the args in to post-renderer-executable such as --post-renderer-args

helm install mychart stable/wordpress --post-renderer ./path/to/render_executable --post-renderer-args "--args_to_render_executable  "

if this proposal be ok, i d like to contribute a PR.

[marckhouzam]

I believe this is a good idea. It was discussed before in #9047 where you will find some guidance on dealing with backwards-compatibility.

But for those not aware, the current way to pass arguments to the post-renderer is to write a little executable shell script that calls the post-renderer with the arguments, and have helm call that script.

[tanguofu]

@marckhouzam could u review this PR: #10514, many thanks