### 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)

return _make_token(TK_OP_ASSIGN_DIV);
					} break;
					default:
						return _make_token(TK_OP_DIV);
				}
				continue; 
			} break;
			case '=': {
				if (GETCHAR(0) == '=') {
					char_idx++;
					return _make_token(TK_OP_EQUAL);
				}
				return _make_token(TK_OP_ASSIGN);
			} break;
			case '<': {
				if (GETCHAR(0) == '=') {
					char_idx++;
					return _make_token(TK_OP_LESS_EQUAL);
				} else if (GETCHAR(0) == '<') {
					char_idx++;
					if (GETCHAR(0) == '=') {
						char_idx++;
						return _make_token(TK_OP_ASSIGN_SHIFT_LEFT);
					}
					return _make_token(TK_OP_SHIFT_LEFT);
				}
				return _make_token(TK_OP_LESS);
			} break;
			case '>': {
				if (GETCHAR(0) == '=') {