Consider not setting browsing context name when noopener/noreferrer are used

[annevk]

<a href=... target=test rel=noopener>test</a>

Basically with noopener/noreferrer a document is proclaiming not to want anything to do with some other document, but can still set some state for that other document. (This is also true with sandboxing flags, but that's a much more understandable case.)

Mozilla is somewhat interested in not propagating name here (test in the example above).

Would others be interested in following that?

cc @cdumez @rniwa @mikewest @mystor

[annevk]

Per #1826 this isn't really web-compatible as name-lookup has to happen first for noreferrer at least and we might as well keep noopener consistent with that.