Parse OpenGL and Vulkan strings as UTF-8.

[bruvzg]

Should fix #84194

[akien-mga]

Thanks!

[GabrielLins64]

Hi, I'm still having the issue:

Godot Engine v4.2.1.stable.official.b09f793f5 - https://godotengine.org
OpenGL API 4.6 (Core Profile) Mesa 21.2.6 - Compatibility - Using Device: Intel - Mesa Intel(R) UHD Graphics 630 (CFL GT2)

Unicode parsing error, some characters were replaced with � (U+FFFD): Invalid UTF-8 leading byte (82)
Unicode parsing error, some characters were replaced with � (U+FFFD): Invalid UTF-8 leading byte (82)
Unicode parsing error, some characters were replaced with � (U+FFFD): Invalid UTF-8 continuation byte (f1 ... 3 ...)
Unicode parsing error, some characters were replaced with � (U+FFFD): Invalid UTF-8 leading byte (88)
Unicode parsing error, some characters were replaced with � (U+FFFD): Invalid UTF-8 continuation byte (cc ... 30 ...)
Unicode parsing error, some characters were replaced with � (U+FFFD): Invalid UTF-8 leading byte (86)
Unicode parsing error, some characters were replaced with � (U+FFFD): Invalid UTF-8 leading byte (86)
Unicode parsing error, some characters were replaced with � (U+FFFD): Invalid UTF-8 continuation byte (f7 ... d ...)