Move "Customise Engine Configuration" into "Tools" and rename

[timothyqiu]

It's a standalone tool that does not affect the project at all.

To avoid confusion, rename it to something like "Engine Compilation Configuration Editor".

[Calinou]

I tried implementing this in https://github.com/Calinou/godot/tree/editor-move-build-profile-editor, but the option now does nothing when clicked and I have no idea why (no error is printed).

[timothyqiu]

The handling code for TOOLS_BUILD_PROFILE_MANAGER should be moved from _menu_option_confirm() into _tool_menu_option() :P

[Calinou]

It works, thanks 🙂

I've opened a PR: godotengine/godot#90441