### 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)

"OP_BIT_AND",
	"OP_BIT_OR",
	"OP_BIT_XOR",
	"OP_BIT_INVERT",
	"OP_INCREMENT",
	"OP_DECREMENT",
	"CF_IF",
	"CF_ELSE",
	"CF_FOR",
	"CF_WHILE",
	"CF_DO",
	"CF_SWITCH",
	"CF_CASE",
	"CF_DEFAULT",
	"CF_BREAK",
	"CF_CONTINUE",
	"CF_RETURN",
	"CF_DISCARD",
	"BRACKET_OPEN",
	"BRACKET_CLOSE",
	"CURLY_BRACKET_OPEN",
	"CURLY_BRACKET_CLOSE",
	"PARENTHESIS_OPEN",
	"PARENTHESIS_CLOSE",
	"QUESTION",
	"COMMA",
	"COLON",
	"SEMICOLON",
	"PERIOD",
	"UNIFORM",