### 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_ERROR, "Invalid (unsigned integer) numeric constant");
							} else {
								return _make_token(TK_ERROR, "Invalid (integer) numeric constant");
							}
						}
					}
					char_idx += str.length();
					Token tk;
					if (period_found || exponent_found || float_suffix_found) {
						tk.type = TK_FLOAT_CONSTANT;
					} else if (uint_suffix_found) {
						tk.type = TK_UINT_CONSTANT;
					} else {
						tk.type = TK_INT_CONSTANT;
					}
					if (hexa_found) {
						tk.constant = (double)str.hex_to_int();
					} else {
						tk.constant = str.to_float();
					}
					tk.line = tk_line;
					return tk;
				}
				if (GETCHAR(0) == '.') {
					
					char_idx++;
					return _make_token(TK_PERIOD);
				}
				if (is_ascii_identifier_char(GETCHAR(0))) {