Initial shared instances backend (#3800)

* Create base shared instance migration and initial routes

* Fix build

* Add version uploads

* Add permissions field for shared instance users

* Actually use permissions field

* Add "public" flag to shared instances that allow GETing them without authorization

* Add the ability to get and list shared instance versions

* Add the ability to delete shared instance versions

* Fix build after merge

* Secured file hosting (#3784)

* Remove Backblaze-specific file-hosting backend

* Added S3_USES_PATH_STYLE_BUCKETS

* Remove unused file_id parameter from delete_file_version

* Add support for separate public and private buckets in labrinth::file_hosting

* Rename delete_file_version to delete_file

* Add (untested) get_url_for_private_file

* Remove url field from shared instance routes

* Remove url field from shared instance routes

* Use private bucket for shared instance versions

* Make S3 environment variables fully separate between public and private buckets

* Change file host expiry for shared instances to 180 seconds

* Fix lint

* Merge shared instance migrations into a single migration

* Replace shared instance owners with Ghost instead of deleting the instance

apps/labrinth/src/routes/v3/mod.rs

@@ -13,6 +13,8 @@ pub mod payouts;
 pub mod project_creation;
 pub mod projects;
 pub mod reports;
+pub mod shared_instance_version_creation;
+pub mod shared_instances;
 pub mod statistics;
 pub mod tags;
 pub mod teams;
@@ -36,6 +38,8 @@ pub fn config(cfg: &mut web::ServiceConfig) {
             .configure(project_creation::config)
             .configure(projects::config)
             .configure(reports::config)
+            .configure(shared_instance_version_creation::config)
+            .configure(shared_instances::config)
             .configure(statistics::config)
             .configure(tags::config)
             .configure(teams::config)