### Godot version

v4.1.dev.custom_build.a7276f1ce

### System information

Win10, AMD 2600, GeForce GTX 1060, Vulkan API 1.3.205

### Issue description

I can't get correct color data from an array of source_color type.
The color data is saved as **Color** in the file:
`shader_parameter/palette = [Color (1, 0, 0, 1), Color (0, 1, 0, 1), Color (0, 0, 1, 1)]`
Shouldn't it be saved as PackedColorArray?


### Steps to reproduce

1.Declare an array of source_color type.
2.Set colors.

### Minimal reproduction project

[shadertest.zip](https://github.com/godotengine/godot/files/11246504/shadertest.zip)

idx++;
			}
		} else if (GETCHAR(0) == '/' && GETCHAR(1) == '*') {
			idx += 2;
			while (true) {
				if (GETCHAR(0) == 0) {
					return 0;
				}
				if (GETCHAR(0) == '*' && GETCHAR(1) == '/') {
					idx += 2;
					break; 
				}
				idx++;
			}
		} else {
			switch (GETCHAR(0)) {
				case ' ':
				case '\t':
				case '\r':
				case '\n': {
					idx++;
				} break; 
				default:
					return idx;
			}
		}
	}
#undef GETCHAR
}
String ShaderLanguage::get_shader_type(const String &p_code) {