### Godot version

4.0.beta14

### System information

windows 10, gles 3, nvidia graphics

### Issue description

SCREEN_TEXTURE  was dropped in beta 14. The suggested replacement is to use ```uniform sampler2D SCREEN_TEXTURE : hint_screen_texture, filter_linear_mipmaps;```, but filter_linear_mipmaps is not recognized as a valid shader type hint and a shader using it fails to compile.

### Steps to reproduce

Create a canvas item shader and use the filter_linear_mipmaps type hint with a sampler2D uniform.

### Minimal reproduction project

N/A
for (int i = 0; i < shader->functions.size(); i++) {
		if (shader->functions[i].name == p_name) {
			ERR_FAIL_INDEX_V(p_argument, shader->functions[i].function->arguments.size(), false);
			FunctionNode::Argument *arg = &shader->functions[i].function->arguments.write[p_argument];
			if (arg->tex_builtin_check) {
				_set_error(vformat(RTR("Sampler argument %d of function '%s' called more than once using both built-ins and uniform textures, this is not supported (use either one or the other)."), p_argument, String(p_name)));
				return false;
			} else if (arg->tex_argument_check) {
				
				if (arg->tex_argument_filter == p_filter && arg->tex_argument_repeat == p_repeat) {
					return true;
				} else {
					_set_error(vformat(RTR("Sampler argument %d of function '%s' called more than once using textures that differ in either filter or repeat setting."), p_argument, String(p_name)));
					return false;
				}
			} else {
				arg->tex_argument_check = true;
				arg->tex_argument_filter = p_filter;
				arg->tex_argument_repeat = p_repeat;
				for (KeyValue<StringName, HashSet<int>> &E : arg->tex_argument_connect) {