is_plugin_enabled() not working as stated in the docs

[KoBeWi]

Godot version

4.0 0810b0d / 3.5

System information

Windows 10 x64

Issue description

Regression from #43734

is_plugin_enabled() description says:

Returns true if the specified plugin is enabled. The plugin name is the same as its directory name.

but in fact it takes full path to cfg file, i.e. res://addons/myplugin/plugin.cfg instead of myplugin.

Either the docs need update or the method should be changed to use plugin dirs (which might be difficult).

Steps to reproduce

1. Enable addon
2. Try calling is_plugin_enabled() following the description in the docs
3. It will return false

Minimal reproduction project

No response

[pfertyk]

I'd like to submit a solution. I've enabled the is_addon_plugin_enabled (called by is_plugin_enabled) to work with both names and full paths. If necessary, I think I can make it work with only names, to keep the behavior consistent with the docs ;)