Windows.Foundation.Metadata.OverrideAttribute generated even when it is already manually specified.

[shmuelie]

Describe the bug
When authoring WinRT Components, CsWinRT will automatically generate the Override attribute for you. If I add my own Override attribute, I expect CsWinRT to not generate one anymore but it still does.

To Reproduce

1. Author a WinRT Component with override methods.
2. Give one of the overrides the Override attribute with a custom name.
3. See that the method will have two Override attributes.

Expected behavior
That the method only has the Override attribute I added.

Version Info

CsWinRT: 2.0.7
.NET SDK: 8.0.204
Windows SDK: 10.0.22621.0