Add file triggers and file meta data (#6344)

* added hint to aggregate

* added support for hint in query

* added else clause to aggregate

* fixed tests

* updated tests

* Add tests and clean up

* added beforeSaveFile and afterSaveFile triggers

* Add support for explain

* added some validation

* added support for metadata and tags

* tests?

* trying tests

* added tests

* fixed failing tests

* added some docs for fileObject

* updated hooks to use Parse.File

* added test for already saved file being returned in hook

* added beforeDeleteFile and afterDeleteFile hooks

* removed contentLength because it's already in the header

* added fileSize param to FileTriggerRequest

* added support for client side metadata and tags

* removed fit test

* removed unused import

* added loging to file triggers

* updated error message

* updated error message

* fixed tests

* fixed typos

* Update package.json

* fixed failing test

* fixed error message

* fixed failing tests (hopefully)

* TESTS!!!

* Update FilesAdapter.js

fixed comment

* added test for changing file name

* updated comments

Co-authored-by: Diamond Lewis <findlewis@gmail.com>

src/Adapters/Files/FilesAdapter.js

@@ -31,10 +31,19 @@ export class FilesAdapter {
    * @param {*} data - the buffer of data from the file
    * @param {string} contentType - the supposed contentType
    * @discussion the contentType can be undefined if the controller was not able to determine it
+   * @param {object} options - (Optional) options to be passed to file adapter (S3 File Adapter Only)
+   * - tags: object containing key value pairs that will be stored with file
+   * - metadata: object containing key value pairs that will be sotred with file (https://docs.aws.amazon.com/AmazonS3/latest/user-guide/add-object-metadata.html)
+   * @discussion options are not supported by all file adapters. Check the your adapter's documentation for compatibility
    *
    * @return {Promise} a promise that should fail if the storage didn't succeed
    */
-  createFile(filename: string, data, contentType: string): Promise {}
+  createFile(
+    filename: string,
+    data,
+    contentType: string,
+    options: Object
+  ): Promise {}
 
   /** Responsible for deleting the specified file
    *