### 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)

temp_error = true;
#else
						return ERR_PARSE_ERROR;
#endif 
					}
					interpolation = get_token_interpolation(tk.type);
					tk = _get_token();
#ifdef DEBUG_ENABLED
					if (keyword_completion_context & CF_INTERPOLATION_QUALIFIER) {
						keyword_completion_context ^= CF_INTERPOLATION_QUALIFIER;
					}
					if (_lookup_next(next)) {
						if (is_token_precision(next.type)) {
							keyword_completion_context ^= CF_PRECISION_MODIFIER;
						} else if (is_token_datatype(next.type)) {
							keyword_completion_context ^= datatype_flag;
						}
					}
					if (temp_error) {
						return ERR_PARSE_ERROR;
					}
#endif 
				}
				if (is_token_precision(tk.type)) {
					precision = get_token_precision(tk.type);
					tk = _get_token();
#ifdef DEBUG_ENABLED
					if (keyword_completion_context & CF_INTERPOLATION_QUALIFIER) {
						keyword_completion_context ^= CF_INTERPOLATION_QUALIFIER;
					}