### 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 (tk.type != TK_COMMA) {
										_set_error(RTR("Expected ',' after integer constant."));
										return ERR_PARSE_ERROR;
									}
									tk = _get_token();
									sign = 1.0;
									if (tk.type == TK_OP_SUB) {
										sign = -1.0;
										tk = _get_token();
									}
									if (tk.type != TK_FLOAT_CONSTANT && !tk.is_integer_constant()) {
										_set_error(RTR("Expected an integer constant after ','."));
										return ERR_PARSE_ERROR;
									}
									uniform.hint_range[1] = tk.constant;
									uniform.hint_range[1] *= sign;
									tk = _get_token();
									if (tk.type == TK_COMMA) {
										tk = _get_token();
										if (tk.type != TK_FLOAT_CONSTANT && !tk.is_integer_constant()) {
											_set_error(RTR("Expected an integer constant after ','."));
											return ERR_PARSE_ERROR;
										}
										uniform.hint_range[2] = tk.constant;
										tk = _get_token();
									} else {
										if (type == TYPE_INT) {
											uniform.hint_range[2] = 1;
										} else {
											uniform.hint_range[2] = 0.001;