Add 9.0.3xx sdk channel

[v-wuzhai]

To double check:

• The right tests are in and the right validation has happened. Guidance: https://github.com/dotnet/arcade/blob/main/Documentation/Validation.md

[v-wuzhai]

@Forgind @marcpopMSFT Thank you for your feedback! I previously thought the ID was custom, but now I understand that the actual ID is assigned by the system when creating a new channel using the darc add-channel <channel> command.