wp_die() status code Plugins component updates (parent ticket: #64009)

[callumbw95]

If you have come here directly, please refer back to the parent ticket here: #64009

This ticket is regarding the wp_die() function calls within the Media component and will cover the following locations. Please note links were correct at the time of testing and writing this up, but line numbers may have changed slightly:

Filepath	Line Number	Context	Status Code	New Code	Code Meaning
src/wp-admin/includes/plugin-install.php	​538	Error: is_wp_error( plugins_api() ;)	500	503	Service Unavailable
src/wp-admin/plugin-editor.php	​18	User Permissions: does not have access	500	403	Forbidden
src/wp-admin/plugin-editor.php	​121	Missing: file	500	404	Not found
src/wp-admin/plugin-editor.php	​128	Error: invalid file type	500	415	Unsupported Media Type
src/wp-admin/plugins.php	​13	User Permissions: does not have access	500	403	Forbidden
src/wp-admin/plugins.php	​50	User Permissions: does not have access	500	403	Forbidden
src/wp-admin/plugins.php	​94	User Permissions: does not have access	500	403	Forbidden
src/wp-admin/plugins.php	​178	User Permissions: does not have access	500	403	Forbidden
src/wp-admin/plugins.php	​201	User Permissions: does not have access	500	403	Forbidden
src/wp-admin/plugins.php	​228	User Permissions: does not have access	500	403	Forbidden
src/wp-admin/plugins.php	​271	User Permissions: does not have access	500	403	Forbidden
src/wp-admin/plugins.php	​451	User Permissions: does not have access	500	403	Forbidden
src/wp-admin/plugins.php	​469	User Permissions: does not have access	500	403	Forbidden
src/wp-admin/plugins.php	​473	Error: is multisite, wrong admin	500	404	Not found
src/wp-admin/plugin-install.php	​19	User Permissions: does not have access	500	403	Forbidden

There are however the following function calls I have not touched as I felt they were already valid with their current status code:

Filepath	Line Number	Status Code
src/wp-admin/plugins.php	​67	500
src/wp-admin/plugins.php	​185	500
src/wp-admin/plugins.php	​459	500
src/wp-admin/plugins.php	​473	500

…s related to the plugins component

Trac ticket: #64024

[nikunj8866]

@callumbw95 I've added a comment regarding a minor adjustment in the PR.

@CallumBW95 Could you please sync the latest wordpress-develop and then merge trunk into this branch? That might help resolve the PHPUnit test checks.