### 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)

if (GETCHAR(0) == '=') {
					char_idx++;
					return _make_token(TK_OP_ASSIGN_BIT_OR);
				} else if (GETCHAR(0) == '|') {
					char_idx++;
					return _make_token(TK_OP_OR);
				}
				return _make_token(TK_OP_BIT_OR);
			} break;
			case '*': {
				if (GETCHAR(0) == '=') {
					char_idx++;
					return _make_token(TK_OP_ASSIGN_MUL);
				}
				return _make_token(TK_OP_MUL);
			} break;
			case '+': {
				if (GETCHAR(0) == '=') {
					char_idx++;
					return _make_token(TK_OP_ASSIGN_ADD);
				} else if (GETCHAR(0) == '+') {
					char_idx++;
					return _make_token(TK_OP_INCREMENT);
				}
				return _make_token(TK_OP_ADD);
			} break;
			case '-': {
				if (GETCHAR(0) == '=') {
					char_idx++;
					return _make_token(TK_OP_ASSIGN_SUB);