It's a bug in the handling of the constant string
## Summary
<!-- Summarize the bug encountered concisely -->
It's a bug in the handling of the constant string (the code that handles the constant value does not correctly handle the case of the string constant being a Unicode string constant unlike the code for expressions)
## System Information
<!-- The more information are provided the easier it is to replicate the bug -->
- **Operating system:** <!-- Windows, Linux (if possible, also name the distro), FreeBSD, Android, ... --> Windows
- **Processor architecture:** <!-- x86, x86-64, ARM, AARCH64, AVR, RISC-V, PowerPC, ... --> x86, x86-64
- **Compiler version:** <!-- 3.2, 3.2.2, 3.3, trunk, beta, ... (if possible, give also the git hash) -->All
- **Device:** <!-- Computer, Tablet, Mobile, Amiga, Microcontroller, ... -->Computer
## Steps to reproduce
<!-- How one can reproduce the issue - this is very important! -->
```pascal
{$codepage utf8}
program project1;
var
ar: PChar = 'Ёжик';
begin
Writeln(strlen(ar)); //Error
Writeln(Length(Ar)); //Error
ar := 'Ёжик';
Writeln(strlen(ar)); //Ok
Writeln(Length(Ar)); //Ok
Readln;
end.
```
## Example Project
<!-- If possible, please create an example project that exhibits the problematic
behavior, and link to it here in the bug report. -->
## What is the current bug behavior?
<!-- What actually happens -->
## What is the expected (correct) behavior?
<!-- What you should see instead --> Incorrect getting pchar variable value.
## Relevant logs and/or screenshots
<!-- Paste any relevant logs - please use code blocks (```) to format console output, logs, and code, as
it's very hard to read otherwise.
You can also use syntax highlighting for Pascal with: ```pascal the code```
For more information see https://docs.gitlab.com/ee/user/markdown.html -->
## Possible fixes
<!-- If you can, link to the line of code that might be responsible for the problem -->
issue