### 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)

DataType nc = p_op->arguments[2]->get_datatype();
			valid = na == TYPE_BOOL && (nb == nc);
			ret_type = nb;
			ret_size = sa;
		} break;
		default: {
			ERR_FAIL_V(false);
		}
	}
	if (r_ret_type) {
		*r_ret_type = ret_type;
	}
	if (r_ret_size) {
		*r_ret_size = ret_size;
	}
	return valid;
}
const ShaderLanguage::BuiltinFuncDef ShaderLanguage::builtin_func_defs[] = {
	
	{ "bool", TYPE_BOOL, { TYPE_BOOL, TYPE_VOID }, { "" }, TAG_GLOBAL, false },
	{ "bvec2", TYPE_BVEC2, { TYPE_BOOL, TYPE_VOID }, { "" }, TAG_GLOBAL, false },
	{ "bvec2", TYPE_BVEC2, { TYPE_BOOL, TYPE_BOOL, TYPE_VOID }, { "" }, TAG_GLOBAL, false },
	{ "bvec3", TYPE_BVEC3, { TYPE_BOOL, TYPE_VOID }, { "" }, TAG_GLOBAL, false },
	{ "bvec3", TYPE_BVEC3, { TYPE_BOOL, TYPE_BOOL, TYPE_BOOL, TYPE_VOID }, { "" }, TAG_GLOBAL, false },
	{ "bvec3", TYPE_BVEC3, { TYPE_BVEC2, TYPE_BOOL, TYPE_VOID }, { "" }, TAG_GLOBAL, false },
	{ "bvec3", TYPE_BVEC3, { TYPE_BOOL, TYPE_BVEC2, TYPE_VOID }, { "" }, TAG_GLOBAL, false },
	{ "bvec4", TYPE_BVEC4, { TYPE_BOOL, TYPE_VOID }, { "" }, TAG_GLOBAL, false },
	{ "bvec4", TYPE_BVEC4, { TYPE_BOOL, TYPE_BOOL, TYPE_BOOL, TYPE_BOOL, TYPE_VOID }, { "" }, TAG_GLOBAL, false },
	{ "bvec4", TYPE_BVEC4, { TYPE_BOOL, TYPE_BVEC2, TYPE_BOOL, TYPE_VOID }, { "" }, TAG_GLOBAL, false },
	{ "bvec4", TYPE_BVEC4, { TYPE_BVEC2, TYPE_BOOL, TYPE_BOOL, TYPE_VOID }, { "" }, TAG_GLOBAL, false },