### 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)

BIND_ENUM_CONSTANT(TEXTURE_ORM);
	BIND_ENUM_CONSTANT(TEXTURE_MAX);
	BIND_ENUM_CONSTANT(TEXTURE_FILTER_NEAREST);
	BIND_ENUM_CONSTANT(TEXTURE_FILTER_LINEAR);
	BIND_ENUM_CONSTANT(TEXTURE_FILTER_NEAREST_WITH_MIPMAPS);
	BIND_ENUM_CONSTANT(TEXTURE_FILTER_LINEAR_WITH_MIPMAPS);
	BIND_ENUM_CONSTANT(TEXTURE_FILTER_NEAREST_WITH_MIPMAPS_ANISOTROPIC);
	BIND_ENUM_CONSTANT(TEXTURE_FILTER_LINEAR_WITH_MIPMAPS_ANISOTROPIC);
	BIND_ENUM_CONSTANT(TEXTURE_FILTER_MAX);
	BIND_ENUM_CONSTANT(DETAIL_UV_1);
	BIND_ENUM_CONSTANT(DETAIL_UV_2);
	BIND_ENUM_CONSTANT(TRANSPARENCY_DISABLED);
	BIND_ENUM_CONSTANT(TRANSPARENCY_ALPHA);
	BIND_ENUM_CONSTANT(TRANSPARENCY_ALPHA_SCISSOR);
	BIND_ENUM_CONSTANT(TRANSPARENCY_ALPHA_HASH);
	BIND_ENUM_CONSTANT(TRANSPARENCY_ALPHA_DEPTH_PRE_PASS);
	BIND_ENUM_CONSTANT(TRANSPARENCY_MAX);
	BIND_ENUM_CONSTANT(SHADING_MODE_UNSHADED);
	BIND_ENUM_CONSTANT(SHADING_MODE_PER_PIXEL);
	BIND_ENUM_CONSTANT(SHADING_MODE_PER_VERTEX);
	BIND_ENUM_CONSTANT(SHADING_MODE_MAX);
	BIND_ENUM_CONSTANT(FEATURE_EMISSION);
	BIND_ENUM_CONSTANT(FEATURE_NORMAL_MAPPING);
	BIND_ENUM_CONSTANT(FEATURE_RIM);
	BIND_ENUM_CONSTANT(FEATURE_CLEARCOAT);
	BIND_ENUM_CONSTANT(FEATURE_ANISOTROPY);
	BIND_ENUM_CONSTANT(FEATURE_AMBIENT_OCCLUSION);
	BIND_ENUM_CONSTANT(FEATURE_HEIGHT_MAPPING);
	BIND_ENUM_CONSTANT(FEATURE_SUBSURFACE_SCATTERING);
	BIND_ENUM_CONSTANT(FEATURE_SUBSURFACE_TRANSMITTANCE);