### Godot version

v4.0.beta13.official [caacade56]

### System information

Windows 8.1

### Issue description

The `Unreachable code (statement after return) in function 'function_name()'` warning is given for functions that do not have unreachable code. The same code does not give this warning in v3.5.stable.official [991bb6ac7].

### Steps to reproduce

```
func warning(i: int) -> void:
  if i == 0:
    pass
  elif i == 1:
    return
  else:
    return
  print("yeah")
```

Removing either the `elif` or the `else` removes the warning.

### Minimal reproduction project

N/A; code in reproduction steps can be placed in any blank gdscript file to trigger the error.
{ nullptr,                                          nullptr,                                        PREC_NONE }, 
		{ &GDScriptParser::parse_await,                  	nullptr,                                        PREC_NONE }, 
		{ nullptr,                                          nullptr,                                        PREC_NONE }, 
		{ nullptr,                                          nullptr,                                        PREC_NONE }, 
		{ nullptr,                                          nullptr,                                        PREC_NONE }, 
		{ nullptr,                                          nullptr,                                        PREC_NONE }, 
		{ nullptr,                                          nullptr,                                        PREC_NONE }, 
		{ nullptr,                                          nullptr,                                        PREC_NONE }, 
		{ &GDScriptParser::parse_lambda,                    nullptr,                                        PREC_NONE }, 
		{ nullptr,                                          &GDScriptParser::parse_binary_operator,      	PREC_CONTENT_TEST }, 
		{ nullptr,                                          &GDScriptParser::parse_binary_operator,      	PREC_TYPE_TEST }, 
		{ nullptr,                                          nullptr,                                        PREC_NONE }, 
		{ &GDScriptParser::parse_preload,					nullptr,                                        PREC_NONE }, 
		{ &GDScriptParser::parse_self,                   	nullptr,                                        PREC_NONE }, 
		{ nullptr,                                          nullptr,                                        PREC_NONE }, 
		{ nullptr,                                          nullptr,                                        PREC_NONE }, 
		{ &GDScriptParser::parse_call,						nullptr,                                        PREC_NONE }, 
		{ nullptr,                                          nullptr,                                        PREC_NONE }, 
		{ nullptr,                                          nullptr,                                        PREC_NONE }, 
		{ nullptr,                                          nullptr,                                        PREC_NONE }, 
		{ &GDScriptParser::parse_yield,                     nullptr,                                        PREC_NONE }, 
		
		{ &GDScriptParser::parse_array,                  	&GDScriptParser::parse_subscript,            	PREC_SUBSCRIPT }, 
		{ nullptr,                                          nullptr,                                        PREC_NONE }, 
		{ &GDScriptParser::parse_dictionary,             	nullptr,                                        PREC_NONE }, 
		{ nullptr,                                          nullptr,                                        PREC_NONE }, 
		{ &GDScriptParser::parse_grouping,               	&GDScriptParser::parse_call,                 	PREC_CALL }, 
		{ nullptr,                                          nullptr,                                        PREC_NONE }, 
		{ nullptr,                                          nullptr,                                        PREC_NONE }, 
		{ nullptr,                                          nullptr,                                        PREC_NONE },