[Release v0.56 blocking] Investigate possible TG Falcon7b model regression

[tt-rkim]

Setting P0 because this is blocking v0.56.

Falcon7b demo on TG was last good here:

https://github.com/tenstorrent/tt-metal/actions/runs/13681043030/job/38254977872
on
db0198e

but we now have what looks like a hang:

https://github.com/tenstorrent/tt-metal/actions/runs/13689206984/job/38279608916
on
2bbd8ca

However, there were a bunch of TG hangs, so this may have solved it: #18702

Running now: https://github.com/tenstorrent/tt-metal/actions/runs/13703860358

cc: @tenstorrent/metalium-developers-infra

[tt-rkim]

There is another regression on top of the one above, but it's a non-deterministic slice error described here: #15059

This shows ND: https://github.com/tenstorrent/tt-metal/actions/runs/13634038681

[skhorasganiTT]

The job you linked passed @tt-rkim, can this be closed?