Integrate llvm/llvm-project@60a1f5a (#20641)

This patch carries revert of

llvm/llvm-project#136640 because linalg.index folder is segfaulting on
inceptionv2 model

llvm/llvm-project#133231. This PR breaks fp_to_subbytes and
emulation_subbyte_types on llvm-cpu tests. iree-test-deps.

llvm/llvm-project#137122. StableHLO and Torch-mlir needs to update their
usage of GreedyRewriteConfig to use fluent API. i.e
enableRegionSimplification = VS setRegionSimplificationLevel

llvm/llvm-project#135970. StableHLO has issue with VHLO_IntegerAttr and
APInt not being updated. StableHLO needs to be updated with that PR's
change for us to be able to integrate.

llvm/llvm-project#121389. Torch-MLIR needs to be
updated with that PR's change for us to be able to integrate.

Signed-off-by: Stanley Winata <[email protected]>

Author: raikonenfnu