Enabling the compatibility renderer leaks Image objects when using the Editor

[Rubonnek]

Tested versions

26b1fd0 - reproducible
4.2.1 - Not reproducible

System information

Godot v4.3.dev (e3b9f08ce) - Arch Linux #1 SMP PREEMPT_DYNAMIC Fri, 05 Jan 2024 16:20:41 +0000 - Tty - GLES3 (Compatibility) - AMD Radeon RX 6900 XT (radeonsi, navi21, LLVM 16.0.6, DRM 3.54, 6.6.10-arch1-1) () - AMD Ryzen 9 5950X 16-Core Processor (32 Threads)

Issue description

Enabling the compatibility renderer will leak Image objects. This issue does not happen with the Forward+ nor the Mobile rendering methods.

I think this issue was introduced within the last two months.

Steps to reproduce

Open the Editor against the MRP through the command line (i.e. for example godot -e --verbose if on path).

Close the editor after a few seconds and you should see a similar message:

WARNING: ObjectDB instances leaked at exit (run with --verbose for details).
     at: cleanup (core/object/object.cpp:2204)
Leaked instance: Image:-9170885200035390510 - Resource path: 
Leaked instance: Image:-9170880252233060709 - Resource path: 
Leaked instance: Image:-9170864309314457951 - Resource path: 
Leaked instance: Image:-9170863759558644050 - Resource path: 
Leaked instance: Image:-9170858811756319055 - Resource path: 
Leaked instance: Image:-9170858262000505166 - Resource path: 
Leaked instance: Image:-9170853863953994059 - Resource path: 
Leaked instance: Image:-9170853314198180170 - Resource path: 
Leaked instance: Image:-9170848366395855175 - Resource path: 
Leaked instance: Image:-9170847816640041286 - Resource path: 

Minimal reproduction project (MRP)

glow.zip - from the demo projects with the Compatibility renderer enabled by default.

[Rubonnek]

The last commit where this issue wasn't happening is 9444d29.

Issue introduced, or made apparent, by #86587.

CC @RandomShaper