Restore an option to create S3 based volumes in the UI

[rampage644]

At the moment S3 based volume option is disabled:

However, it works through an internal API:

http http://localhost:3000/v1/metastore/volumes ident=demo type=s3 credentials:='{"credential_type":"access_key","aws-access-key-id":"minioadmin","aws-secret-access-key":"minioadmin"}' bucket=mybucket endpoint='http://warehouse.minio:9000'
HTTP/1.1 200 OK
content-length: 349
content-type: application/json
date: Thu, 03 Jul 2025 17:34:48 GMT

{
"bucket": "mybucket",
"created_at": "2025-07-03T17:34:48.233660758",
"credentials": {
"aws-access-key-id": "",
"aws-secret-access-key": "",
"credential_type": "access_key"
},
"endpoint": "http://warehouse.minio:9000",
"ident": "demo",
"metadata-endpoint": null,
"region": null,
"skip-signature": null,
"type": "s3",
"updated_at": "2025-07-03T17:34:48.233660758"
}