[pt2][inductor] update choice caller hashes (#94853)
Summary:
update the hashing method for `ChoiceCaller` class.
`TritonTemplateCaller` objects will now be hashed to:
`{name}-({BLOCK_M}, {BLOCK_N}, {BLOCK_K})-{num_stages}-{num_warps}-{code_hash}`
for example:
`triton_mm-(64, 32, 32)-4-8-cptlntwzcl2gaaofd2oabdwhaqv4ox3lluvbuxitjfhhpz6cyl4o`
`ExternKernelCaller` objects will now be hashed to:
`{name}-{kwargs.keys()[0]}={kwargs.vals()[0]}-...-{code_hash}`
for example:
`addmm-alpha=1-beta=1-c4xxd3iocu4yt6z4udrlqnumays7q6mfnfd3qprh4fxgsvyhqdkf`
Test Plan: sandcastle
Differential Revision: D43285470
Pull Request resolved: https://github.com/pytorch/pytorch/pull/94853
Approved by: https://github.com/jansel, https://github.com/bertmaher
