Add m.room.create to invite_room_state

[richvdh]

for spaces work, we want m.room.create to be included in the state that gets included with an invite (ie, the invite_room_state). In theory there is a config option for this, but @t3chguy tried setting it and it didn't work.

This work is to investigate and fix the config option not working.

[t3chguy]

It worked when inviting over federation but with some light testing and not much digging did not work for local users.

[richvdh]

fixed by #9710