### Godot version

4.0.beta16

### System information

Windows 10 Pro x64, GLES3, RTX 3080 Ti (528.02)

### Issue description

In Compatibility/GLES3 back-end, shaders which use a uniform to get the normal roughness buffer cannot compile. For example, the shader:
```glsl
shader_type spatial;

uniform sampler2D normal_roughness_texture : hint_normal_roughness_texture;

void fragment() {
    vec4 sample = texture(normal_roughness_texture, UV);
}
```
results in an error in the output:
```
  drivers/gles3/shader_gles3.cpp:242 - SceneShaderGLES3: Fragment shader compilation failed:
  0(890) : error C1503: undefined variable "normal_roughness_buffer"
  
  drivers/gles3/shader_gles3.cpp:342 - Method/function failed.
```

If I switch over to the Mobile or Forward+ backends, there is no shader compilation error.

### Steps to reproduce

Open the attached reproduction in the 4.0.beta16 editor.

When the scene is opened, the error is produced automatically:
1. Open `scene.tscn`
2. Open Output to review error

When the scene is saved with any changes made to the shader, the same error is also produced:
1. Open `scene.tscn`
2. Open `example.gdshader` in the shader editor.
3. Make a compile-able change to the shader.
4. Save the scene
5. Open Output to review the error

### Minimal reproduction project

[NormalRoughnessTexture_GLES3_Error.zip](https://github.com/godotengine/godot/files/10534253/NormalRoughnessTexture_GLES3_Error.zip)

_set_error(vformat(RTR("Expected integer constant within [%d..%d] range."), min, max));
									return false;
								}
							}
							constarg_idx++;
						}
					}
					
					int outarg_idx = 0;
					while (builtin_func_out_args[outarg_idx].name) {
						if (String(name) == builtin_func_out_args[outarg_idx].name) {
							for (int arg = 0; arg < BuiltinFuncOutArgs::MAX_ARGS; arg++) {
								int arg_idx = builtin_func_out_args[outarg_idx].arguments[arg];
								if (arg_idx == -1) {
									break;
								}
								if (arg_idx < argcount) {
									if (p_func->arguments[arg_idx + 1]->type != Node::TYPE_VARIABLE && p_func->arguments[arg_idx + 1]->type != Node::TYPE_MEMBER && p_func->arguments[arg_idx + 1]->type != Node::TYPE_ARRAY) {
										_set_error(vformat(RTR("Argument %d of function '%s' is not a variable, array, or member."), arg_idx + 1, String(name)));
										return false;
									}
									if (p_func->arguments[arg_idx + 1]->type == Node::TYPE_ARRAY) {
										ArrayNode *mn = static_cast<ArrayNode *>(p_func->arguments[arg_idx + 1]);
										if (mn->is_const) {
											fail = true;
										}
									} else if (p_func->arguments[arg_idx + 1]->type == Node::TYPE_MEMBER) {
										MemberNode *mn = static_cast<MemberNode *>(p_func->arguments[arg_idx + 1]);
										if (mn->basetype_const) {
											fail = true;