RADV: backport ngg streamout fix to 23.2
This MR !25284 (merged) contains some fixes and improvements, however the commits have no backport tag.
f0abdaea in particular, though described as an improvement and not a fix, allows Zink to pass CTS on RDNA3.
I think it would be appropriate for this fix to be backported to the current stable release or else xfb would remain broken until 23.3 releases.
I also have a different patch that solves the issue in isolation though it would need to be reviewed, so I would prefer for the original commit to be backported (there are no conflicts).