### 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)

{ TK_HINT_SOURCE_COLOR, "source_color", CF_UNSPECIFIED, {}, {} },
	{ TK_HINT_RANGE, "hint_range", CF_UNSPECIFIED, {}, {} },
	{ TK_HINT_INSTANCE_INDEX, "instance_index", CF_UNSPECIFIED, {}, {} },
	
	{ TK_HINT_NORMAL_TEXTURE, "hint_normal", CF_UNSPECIFIED, {}, {} },
	{ TK_HINT_DEFAULT_WHITE_TEXTURE, "hint_default_white", CF_UNSPECIFIED, {}, {} },
	{ TK_HINT_DEFAULT_BLACK_TEXTURE, "hint_default_black", CF_UNSPECIFIED, {}, {} },
	{ TK_HINT_DEFAULT_TRANSPARENT_TEXTURE, "hint_default_transparent", CF_UNSPECIFIED, {}, {} },
	{ TK_HINT_ANISOTROPY_TEXTURE, "hint_anisotropy", CF_UNSPECIFIED, {}, {} },
	{ TK_HINT_ROUGHNESS_R, "hint_roughness_r", CF_UNSPECIFIED, {}, {} },
	{ TK_HINT_ROUGHNESS_G, "hint_roughness_g", CF_UNSPECIFIED, {}, {} },
	{ TK_HINT_ROUGHNESS_B, "hint_roughness_b", CF_UNSPECIFIED, {}, {} },
	{ TK_HINT_ROUGHNESS_A, "hint_roughness_a", CF_UNSPECIFIED, {}, {} },
	{ TK_HINT_ROUGHNESS_NORMAL_TEXTURE, "hint_roughness_normal", CF_UNSPECIFIED, {}, {} },
	{ TK_HINT_ROUGHNESS_GRAY, "hint_roughness_gray", CF_UNSPECIFIED, {}, {} },
	{ TK_HINT_SCREEN_TEXTURE, "hint_screen_texture", CF_UNSPECIFIED, {}, {} },
	{ TK_HINT_NORMAL_ROUGHNESS_TEXTURE, "hint_normal_roughness_texture", CF_UNSPECIFIED, {}, {} },
	{ TK_HINT_DEPTH_TEXTURE, "hint_depth_texture", CF_UNSPECIFIED, {}, {} },
	{ TK_FILTER_NEAREST, "filter_nearest", CF_UNSPECIFIED, {}, {} },
	{ TK_FILTER_LINEAR, "filter_linear", CF_UNSPECIFIED, {}, {} },
	{ TK_FILTER_NEAREST_MIPMAP, "filter_nearest_mipmap", CF_UNSPECIFIED, {}, {} },
	{ TK_FILTER_LINEAR_MIPMAP, "filter_linear_mipmap", CF_UNSPECIFIED, {}, {} },
	{ TK_FILTER_NEAREST_MIPMAP_ANISOTROPIC, "filter_nearest_mipmap_anisotropic", CF_UNSPECIFIED, {}, {} },
	{ TK_FILTER_LINEAR_MIPMAP_ANISOTROPIC, "filter_linear_mipmap_anisotropic", CF_UNSPECIFIED, {}, {} },
	{ TK_REPEAT_ENABLE, "repeat_enable", CF_UNSPECIFIED, {}, {} },
	{ TK_REPEAT_DISABLE, "repeat_disable", CF_UNSPECIFIED, {}, {} },
	{ TK_ERROR, nullptr, CF_UNSPECIFIED, {}, {} }
};
ShaderLanguage::Token ShaderLanguage::_get_token() {