Support path-based S3 storage. Closes #1495 (#1496)

* Support path-based S3 storage. Closes #1495

Revert "Remove forcing old path-style URLs with s3. Closes #497"

This reverts commit b2953028cf.

* #1495 Path-style S3 compatibile URLs implemented

https://github.com/owncast/owncast/issues/1495

It gives ability to use S3 compatibile providers that doesn't
support virtual-host-style URLs (i.e. Oracle Cloud Object Storage)

Co-authored-by: Artur Angiel <artur@angiel.ovh>

models/s3Storage.go

@@ -10,4 +10,5 @@ type S3 struct {
 	Bucket          string `json:"bucket,omitempty"`
 	Region          string `json:"region,omitempty"`
 	ACL             string `json:"acl,omitempty"`
+	ForcePathStyle  bool   `json:"forcePathStyle"`
 }