Mime type not passed to azure storage when tempfiles are used

[swenzel-arc]

Describe the Bug

When uploads are configured to use temporary files, the mime types are not stored with the blob object in azure storage.
The fix is an easy one-liner. In addition to the abort signal here:

payload/packages/storage-azure/src/handleUpload.ts

Line 37 in 94d2249

abortSignal: AbortController.timeout(30 * 60 * 1000),

There just needs to be the content type header:

blobHTTPHeaders: { blobContentType: file.mimeType }

I'll create a PR to fix this next.

Link to the code that reproduces this issue

https://github.com/thearc-hq/oss-payload/blob/test-azure-svg-upload/test/_community/int.spec.ts#L28

Reproduction Steps

1. Configure uploads to use temporary files
2. Use azure storage adapter
3. Upload an Image file via Web UI
4. Check the content-type header when downloading the file (it is application/octet-stream)

Which area(s) are affected?

plugin: storage-*

Environment Info

I think we don't need this.