fix 4MB index-cache.yaml limit with Azure Blob Storage

[yuanjumao]

Currently, this implementation does not use the azure API's chunked upload, so we will always only be able to upload blobs smaller than 4MB. This PR adds chunked uploads that allow more than 4MB.

Ref: https://learn.microsoft.com/en-us/rest/api/storageservices/append-block, limited by request header Content-Length

[cbuto]

thanks for the PR @yuanjumao! can you rebase with main please?

[yuanjumao]

@cbuto Okay, I've already done a rebase with main

[cbuto]

I finally got to do some testing, overall it looks like this solves the 4 MB upload issue.

just one minor nit about the variable naming

[cbuto]

@scbizu do you want to have a second look here? I ran this locally and uploads worked fine, plus I tested with uploading a large chart.

[scbizu]

LGTM , but if we migrate the dependency , this PR changes will still work ?

[cbuto]

@scbizu I think it would based on a brief glance but i think we'll just have to cross that bridge when we migrate to the new module

[scbizu]

@cbuto Yes, definitely . Let's raise another PR to migrate that and involve some testing .

[cbuto]

@scbizu it might be a decent sized effort to migrate to the new module (i don't have much context around the azure SDK/API), maybe we should get this in and deal with the migration later on

[scbizu]

@cbuto ok , let's merge this PR to fix the temporary situation .

[cbuto]

thanks @yuanjumao! i'll create a release shortly and bump the module in chartmuseum 🙏