Add `awslabs/smithy-rs-server` as a crate owner in the `publisher` tool (#1619)

This commit adds the SDK and server groups to smithy-rs runtime crates,
but only the SDK group on `AwsRuntime` and `AwsSdk` crates.

With this change, the `publisher` tool won't fail when publishing the
`aws-smithy-http-server` crate.