Upload: Introduce the {$action}_overrides filter that allows the overrides parameter for file uploads and file sideloads to be filtered.

The dynamic portion of the hook name, `$action`, refers to the post action.

Props iandunn, jakub.tyrcha, nacin, wonderboymusic, Mte90, johnbillion

Fixes #16849


git-svn-id: https://develop.svn.wordpress.org/trunk@49845 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-admin/includes/media.php

@@ -430,7 +430,7 @@ function media_handle_upload( $file_id, $post_id, $post_data = array(), $overrid
  * @since 2.6.0
  * @since 5.3.0 The `$post_id` parameter was made optional.
  *
- * @param array  $file_array Array similar to a `$_FILES` upload array.
+ * @param array  $file_array Array that represents a `$_FILES` upload array.
  * @param int    $post_id    Optional. The post ID the media is associated with.
  * @param string $desc       Optional. Description of the side-loaded file. Default null.
  * @param array  $post_data  Optional. Post data to override. Default empty array.