### 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)

} else if (GETCHAR(0) == '-') {
					char_idx++;
					return _make_token(TK_OP_DECREMENT);
				}
				return _make_token(TK_OP_SUB);
			} break;
			case '%': {
				if (GETCHAR(0) == '=') {
					char_idx++;
					return _make_token(TK_OP_ASSIGN_MOD);
				}
				return _make_token(TK_OP_MOD);
			} break;
			case '@': {
				if (GETCHAR(0) == '@' && GETCHAR(1) == '>') {
					char_idx += 2;
					LocalVector<char32_t> incp;
					while (GETCHAR(0) != '\n') {
						incp.push_back(GETCHAR(0));
						char_idx++;
					}
					incp.push_back(0); 
					String include_path(incp.ptr());
					include_positions.write[include_positions.size() - 1].line = tk_line;
					FilePosition fp;
					fp.file = include_path;
					fp.line = 0;
					tk_line = 0;
					include_positions.push_back(fp);
				} else if (GETCHAR(0) == '@' && GETCHAR(1) == '<') {