use curl instead of cr

[pat-s]

More issues than help. Broke again after the most recent 1.7 release when releasing chart 2.0.4.

A curl command to upload to create a GH release directly should be more resilient.

[xoxys]

Compared to cr its really unreadable 🙈 whats the current issue with the latest cr release? Just stick with the working version for now if its a known bug?

[pat-s]

Well, cr is also not really readable (why does it need like five flags to do a simple gh-pages publish?) and in the end it is only doing an API call to the GH releases endpoint anyway.

Personally, I'd drop the gh-pages upload entirely.
I am absolutely unhappy maintaining cr solely for this purpose. In all environments/projects I've used in the last 3 years it broke for almost every point release (and in between). In addition, I don't see why one would need an additional packaging wrapper just for helm charts. The OCI variant shows how easy a chart release can be and is on top using helm itself.

So: either somebody else commits to maintain cr from here onward or we drop it. Overall I'd prefer dropping the upload to gh-pages entirely and just keep the OCI variant (and yes I know this is breaking).