@tus/s3-store: Doesn't work with R2

[push1st1k]

After upgrading to the 1.2.0 version it's not possible to upload files to R2 anymore due to added 'Tagging' header.
The error message is: The header 'x-amz-tagging' is not supported by R2 (it's really not supported by R2 https://developers.cloudflare.com/r2/api/s3/api/).

This PR introduced that new 'Tagging' header.

It would be great to detect which provider (S3 or R2) is used or add an option to configure that.

[Murderlon]

Thanks for the issue. We'll take a look.

Duplicate of #538