Add Perf Kernels

This is a combination of 2 commits.

Add Perf Kernels

Add Perf Kernels

This is a combination of 6 commits.

add perf-kernels

fix formating issues

fix unused variables and other bugs

fix other issues

remove scripts

save

check changes

format

save

save

try

pre-commit check

save

Change all block pointers to tensor pointers

Block pointers are for nvidia TMAs. They are useful for regular loads as well but not well supported.

Also cleaned up some code I came across along the way and updated comment at the top.

Add support for layouts commonly used by users.

Add option for varlen / thd layout to specify equal context lengths for all batches. Also often used by users.

* remove on push for Integration Tests

* rename

* add post merge test

* save

* dtype params

* skip bad config

* fix more stuff

Increase CI timeout

Couple of FA optimizations

Set SM scale multiplication to a constexpr. Minor asm improvement.

Changed acc scaling to adjust for softmax division to
multiplication with reciprocal. ~10% perf improvement.

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Co-authored-by: Michael Melesse <[email protected]>