### Godot version

4.1.1.stable, 4.2.dev (2282fc5de)

### System information

Arch Linux - X11 - GLES3 (Compatibility) - NVIDIA GeForce RTX 3060 Ti (nvidia; 535.104.05) - 13th Gen Intel(R) Core(TM) i5-13400F (16 Threads)

### Issue description

When using Compatibility renderer, adjusting the Alpha component of clear color affects 2D editor content.

This does not happen when using Forward+ or Mobile renderer. Does not affect 3D editor and the running game.


https://github.com/godotengine/godot/assets/372476/e398522e-590a-4832-959f-ea8ba8e71c5d



### Steps to reproduce

1. Create a project using Compatibility renderer.
2. Adjust the clear color's alpha component in Project Settings.

### Minimal reproduction project

N/A
if (instance_uses_color || instance_uses_custom_data) {
						glEnableVertexAttribArray(5);
						glVertexAttribIPointer(5, 4, GL_UNSIGNED_INT, instance_stride * sizeof(float), CAST_INT_TO_UCHAR_PTR(instance_color_offset * sizeof(float)));
						glVertexAttribDivisor(5, 1);
					}
				}
				GLenum primitive_gl = prim[int(primitive)];
				if (use_index_buffer) {
					glDrawElementsInstanced(primitive_gl, mesh_storage->mesh_surface_get_vertices_drawn_count(surface), mesh_storage->mesh_surface_get_index_type(surface), 0, instance_count);
				} else {
					glDrawArraysInstanced(primitive_gl, 0, mesh_storage->mesh_surface_get_vertices_drawn_count(surface), instance_count);
				}
				glBindBuffer(GL_ARRAY_BUFFER, 0);
				glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
				if (use_instancing) {
					glDisableVertexAttribArray(5);
					glDisableVertexAttribArray(6);
					glDisableVertexAttribArray(7);
					glDisableVertexAttribArray(8);
				}
			}
		} break;
		case Item::Command::TYPE_TRANSFORM:
		case Item::Command::TYPE_CLIP_IGNORE:
		case Item::Command::TYPE_ANIMATION_SLICE: {
			
		} break;
	}
}
void RasterizerCanvasGLES3::_add_to_batch(uint32_t &r_index, bool &r_batch_broken) {