### 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)

actions.renames["TIME"] = "time";
		actions.renames["PI"] = _MKSTR(Math_PI);
		actions.renames["TAU"] = _MKSTR(Math_TAU);
		actions.renames["E"] = _MKSTR(Math_E);
		actions.renames["AT_LIGHT_PASS"] = "false";
		actions.renames["INSTANCE_CUSTOM"] = "instance_custom";
		actions.renames["COLOR"] = "color";
		actions.renames["NORMAL"] = "normal";
		actions.renames["NORMAL_MAP"] = "normal_map";
		actions.renames["NORMAL_MAP_DEPTH"] = "normal_map_depth";
		actions.renames["TEXTURE"] = "color_texture";
		actions.renames["TEXTURE_PIXEL_SIZE"] = "color_texture_pixel_size";
		actions.renames["NORMAL_TEXTURE"] = "normal_texture";
		actions.renames["SPECULAR_SHININESS_TEXTURE"] = "specular_texture";
		actions.renames["SPECULAR_SHININESS"] = "specular_shininess";
		actions.renames["SCREEN_UV"] = "screen_uv";
		actions.renames["SCREEN_PIXEL_SIZE"] = "screen_pixel_size";
		actions.renames["FRAGCOORD"] = "gl_FragCoord";
		actions.renames["POINT_COORD"] = "gl_PointCoord";
		actions.renames["INSTANCE_ID"] = "gl_InstanceIndex";
		actions.renames["VERTEX_ID"] = "gl_VertexIndex";
		actions.renames["LIGHT_POSITION"] = "light_position";
		actions.renames["LIGHT_DIRECTION"] = "light_direction";
		actions.renames["LIGHT_IS_DIRECTIONAL"] = "is_directional";
		actions.renames["LIGHT_COLOR"] = "light_color";
		actions.renames["LIGHT_ENERGY"] = "light_energy";
		actions.renames["LIGHT"] = "light";
		actions.renames["SHADOW_MODULATE"] = "shadow_modulate";
		actions.renames["texture_sdf"] = "texture_sdf";
		actions.renames["texture_sdf_normal"] = "texture_sdf_normal";