nx2: give the gsv commands games call their real behavior

The commands every Switch 2 title sends while setting up graphics, written
from how the console's server handles them:
- 201, 301, 401-403, 1101, 1102, 1501-1503: permission checks against the
  session's capabilities; games only ask for what they are granted, so
  answer success.
- 115 (u64 requested features): reply with the granted subset. A zeroed
  reply denied every feature.
- 126: one bit of session state; clear.
- 434 (address space id from nx2:gpu 33): the session takes a reference on
  that address space; remember the id.
- 11 (copy handle): handed over once per session; a second call fails.
- 1111 (u32): a version or mode value; accept it.

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