Add support for upload on s3 bucket in eu-central-2

[dbouclier]

I'm migrating my buckets from eu-central-1 (Frankfurt) to eu-central-2 (Zurich),
using following example configuration code which is working well when storeTo:region = "eu-central-1,
bucket configuration are exactly the same in both region

       client
            .picker({
                fromSources: ['local_file_system'],
                storeTo: {
                    location: 's3',
                    region: 'eu-central-2',
                    container: 'filestack-uploads',
                },
                ... 
                }

Expected Behavior

I expect same behavior as eu-central-1

call "https://upload.filestackapi.com/multipart/start" will return 200
and then call https://upload.filestackapi.com/multipart/complete will succeed too

Current Behavior

call to "https://upload.filestackapi.com/multipart/start" return HTTP 400 with this payload

{"error":"invalid params: store:region","timestamp":1706021363}

Additional Screenshots

1

Your Environment

• Version used: "filestack-js": "^3.30.0",
• Browser Name and version: Firefox 121.0.1
• Operating System and version (desktop or mobile): Linux Mint