Fix bugs in stablehlo reduce op conversion

[mmanzoorTT]

fixes #848

[uazizTT]

I think @mrakitaTT already made some fixes in this commit

df424f2

[mrakitaTT]

Discussed offline with Asif and Aleks, just to document the conclusions.

This is already tracked with #805, I've wrote there the current situation: #805 (comment)

I will escalate this metal issue in TTNN Op Bugs/WAs component and discuss if we can make the workaround since it doesn't seem likely that Metal team will fix this on their side.

If we decide to make a workaround, then I would rather close this PR and send the PR with the fixes that I've already made here and here, because they cover this issue more generally. Fix that Asif made is working only for full reduce (across all dimensions).

Let's leave this PR open in case that we decide to wait on Metal team, because we can still support the specific case that Asif fixed without it being "workaround", though I would make a few changes to the code in that case.