… is default (#190)Closes#188.For context, the `MaxPortShareLevel` template metadata value was notpresent on the `coderd` create template request prior to 2.15. As such,during template creation we need to send an update request for backwardscompatibility (though we could probably remove this soon), see#110.Whilst we don't send this update request is the attribute is omitted onthe resource, we were sending a spurious update request if the value wasexplicitly configured to the default value ('owner' for enterprise+,'public' otherwise). This was causing the error in the linked issue. Anexample is seen in the newly added test.The fix is to just not send that update request if the configured valueis:- Unknown- Equal to the value on the newly created template.note: I'd recommend hiding the whitespace when reviewing the diff