Integrate LLVM to llvm/llvm-project@e89dc2172f0d (#24863)

Still carries a temporary revert of llvm/llvm-project@202ece62657c from
`sm-iree-integrates/llvm-20260821`. Should be dropped in the next
integrate via llvm/llvm-project#218693.

This cherry-picks an additional hotfix: llvm/llvm-project#219301.

Adaptations required:
llvm/llvm-project@979b72237338 - `SymbolOpInterface` no longer provides
implicit symbol traits, so a bunch of ops need updating with name and
visibility properties
llvm/llvm-project@180a0fc57c88 - symbol visibility query API has changed
llvm/llvm-project@325a853c1264 - using lowered result type for MLIR LLVM
int constants
llvm/llvm-project@8fe50937417b - attribute ordering for named Linalg ops
llvm/llvm-project@ad9dc60252ed - discardable/inherent attribute ordering
llvm/llvm-project@bfd1a003fb33 - `alloc_tensor` properties separated out
llvm/llvm-project@3e3927f7166c - change in printer defaults for property
dictionaries

Adaptations to llvm/llvm-project@979b72237338 affect Torch-MLIR, so the
`iree-org` fork was advanced to `sm-iree-integrates/torch-20260827`
accordingly.

Assisted-by: OpenAI Codex

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Signed-off-by: Artem Gindinson <gindinson@roofline.ai>