feat: implement direct upload (#12328)

* feat: implement direct upload

* feat: add direct-upload endpoint

* refactor: implement feedback

* refactor: have a dedicated endpoint for direct uploads

* refactor: convert responses to snakecase

* refactor: rename method to createImport

* test: add tests for the presigned-urls endpoint

packages/core/utils/src/file/abstract-file-provider.ts

@@ -187,8 +187,8 @@ export class AbstractFileProviderService implements IFileProvider {
    *   }
    * }
    */
-  getAsStream(fileData: FileTypes.ProviderGetFileDTO): Promise<Readable> {
-    throw Error("getAsStream must be overridden by the child class")
+  getDownloadStream(fileData: FileTypes.ProviderGetFileDTO): Promise<Readable> {
+    throw Error("getDownloadStream must be overridden by the child class")
   }
 
   /**