### 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)

static const char *op_names[OP_MAX] = { "==",
		"!=",
		"<",
		"<=",
		">",
		">=",
		"&&",
		"||",
		"!",
		"-",
		"+",
		"-",
		"*",
		"/",
		"%",
		"<<",
		">>",
		"=",
		"+=",
		"-=",
		"*=",
		"/=",
		"%=",
		"<<=",
		">>=",
		"&=",
		"|=",