[TRACKER] 4.x OpenGL Compatibility renderer issues

[Calinou]

This issue tracks issues specific to the OpenGL renderer in Godot 4. Godot 3 issues are not tracked here.

See also https://github.com/godotengine/godot/issues/55871, which is specific to Vulkan Mobile-only issues.

### Bugs
- [ ] https://github.com/godotengine/godot/issues/58927
- [ ] https://github.com/godotengine/godot/issues/65702
- [x] https://github.com/godotengine/godot/issues/65977
- [ ] https://github.com/godotengine/godot/issues/66456
- [x] https://github.com/godotengine/godot/issues/66459
- [x] https://github.com/godotengine/godot/issues/66462
- [x] https://github.com/godotengine/godot/issues/66463
- [x] https://github.com/godotengine/godot/issues/66464
- [ ] https://github.com/godotengine/godot/issues/68464
- [x] https://github.com/godotengine/godot/issues/71799
- [x] https://github.com/godotengine/godot/issues/72488
- [ ] https://github.com/godotengine/godot/issues/72602
- [ ] https://github.com/godotengine/godot/issues/72873
- [x] https://github.com/godotengine/godot/issues/72882
- [x] https://github.com/godotengine/godot/issues/73826
- [ ] https://github.com/godotengine/godot/issues/74111
- [ ] https://github.com/godotengine/godot/issues/76334
- [ ] https://github.com/godotengine/godot/issues/76802
- [ ] https://github.com/godotengine/godot/issues/79567
- [ ] https://github.com/godotengine/godot/issues/79581
- [ ] https://github.com/godotengine/godot/issues/82485
- [ ] https://github.com/godotengine/godot/issues/82503
- [ ] https://github.com/godotengine/godot/issues/82505
- [ ] https://github.com/godotengine/godot/issues/83313
- [ ] https://github.com/godotengine/godot/issues/83788
- [ ] https://github.com/godotengine/godot/issues/84386
- [ ] https://github.com/godotengine/godot/issues/84441
- [ ] https://github.com/godotengine/godot/issues/87176
- [ ] https://github.com/godotengine/godot/issues/87763

### Missing features compared to `3.x` GLES3
- [ ] https://github.com/godotengine/godot/issues/66455
- [ ] https://github.com/godotengine/godot/issues/66457
- [ ] https://github.com/godotengine/godot/issues/66596
- [ ] https://github.com/godotengine/godot/issues/69462
- [ ] https://github.com/godotengine/godot/issues/69463
- [ ] https://github.com/godotengine/godot/issues/72823
- [ ] https://github.com/godotengine/godot/issues/71029
- [ ] https://github.com/godotengine/godot/issues/86318

### Enhancements
- [ ] https://github.com/godotengine/godot/issues/82504
- [ ] https://github.com/godotengine/godot/issues/76774

### Pull requests
- [ ] https://github.com/godotengine/godot/pull/66465

[acedogblast]

Missing issue #71799.

[mrjustaguy]

Says Projectors, Reflection Probes and Lightmaps are not supported but planned in warnings but not here in missing features

[mrjustaguy]

also https://github.com/godotengine/godot/issues/83313

[TokisanGames]

How about adding the standard OpenGLES integer texture formats, since they are supported by hardware, the RenderingDevice, and shaders? Since we don't have buffers, textures are the only options, and floats are cumbersome and wasteful to work with when you want bit-packed integer based data blocks or control maps without texture filtering or float conversion.

Proposal: https://github.com/godotengine/godot-proposals/issues/7540

FORMAT_RF Workaround: https://github.com/godotengine/godot/issues/57841#issuecomment-1773930802

[Lasuch69]

@Calinou could you please include reflection probes in missing features. Thanks in advance! :)

Opened an issue for it: https://github.com/godotengine/godot/issues/86318

[Chaosus]

@Lasuch69 I've fixed it (not sure why tags are not rendered).

[mrjustaguy]

New issue to add - Compatibility Positional Shadows assigning wrong Shadow maps - https://github.com/godotengine/godot/issues/92486