### 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
int idx = 0;
				bool low_end = RenderingServer::get_singleton()->is_low_end();
				if (stages && stages->has(skip_function)) {
					for (const KeyValue<StringName, StageFunctionInfo> &E : (*stages)[skip_function].stage_functions) {
						matches.insert(String(E.key), ScriptLanguage::CODE_COMPLETION_KIND_FUNCTION);
					}
				}
				while (builtin_func_defs[idx].name) {
					if (low_end && builtin_func_defs[idx].high_end) {
						idx++;
						continue;
					}
					matches.insert(String(builtin_func_defs[idx].name), ScriptLanguage::CODE_COMPLETION_KIND_FUNCTION);
					idx++;
				}
			} else { 
				int idx = 0;
				bool low_end = RenderingServer::get_singleton()->is_low_end();
				while (builtin_func_defs[idx].name) {
					if (low_end && builtin_func_defs[idx].high_end) {
						idx++;
						continue;
					}
					if (builtin_func_defs[idx].tag == completion_class) {
						matches.insert(String(builtin_func_defs[idx].name), ScriptLanguage::CODE_COMPLETION_KIND_FUNCTION);
					}
					idx++;
				}
			}
			for (const KeyValue<String, ScriptLanguage::CodeCompletionKind> &E : matches) {