fix(material/radio): clear names from host nodes

[crisbeto]

trafficstars

Along the same lines as #15368. Clears the name from the host node of the radio button and radio group, because they end up being forwarded to the underlying input and can cause double results when using something like getElementsByName.

[amysorto]

Shoud the name be assigned to the inner input? In a test within google3, the input within the radio had this name "mat-radio-group-0" instead of what was being passed in.

[andrewseguin]

@crisbeto Heads up that Amy has a quick question about going forward on this change

[crisbeto]

I think that we talked through this over DM at some point. The fix is correct, but it ended up breaking internally because apps were projecting all sorts of unrelated content into the radio buttons.

[andrewseguin]

Gotcha thanks - @amysorto Do you have a good idea on how to get those tests passing with this change? Feel free to pair with myself or Kristiyan to get this in

[crisbeto]

Looks like this is really breaking internally. I'll close it for now since we haven't gotten any issue reports about it.

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