### 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)

} else {
										repeated = true;
									}
									break;
								default:
									ok = false;
									break;
							}
						}
					} break;
					case TYPE_BVEC4:
					case TYPE_IVEC4:
					case TYPE_UVEC4:
					case TYPE_VEC4: {
						int l = ident.length();
						if (l == 1) {
							member_type = DataType(dt - 3);
						} else if (l == 2) {
							member_type = DataType(dt - 2);
						} else if (l == 3) {
							member_type = DataType(dt - 1);
						} else if (l == 4) {
							member_type = dt;
						} else {
							ok = false;
							break;
						}
						const char32_t *c = ident.ptr();
						for (int i = 0; i < l; i++) {
							switch (c[i]) {