Synchronize submodules with LLVM at llvm/llvm-project@48d868493fa7

Updates LLVM dependencies to match
[48d868493fa7](https://github.com/llvm/llvm-project/commit/48d868493fa7).
- TensorFlow to
[a8b6a7c9c5ef](https://github.com/tensorflow/tensorflow/commit/a8b6a7c9c5ef)
- MLIR-HLO to
[0fe512249d21](https://github.com/tensorflow/mlir-hlo/commit/${MLIR_HLO_SHA?})

`./scripts/git/update_to_llvm_syncpoint.py`

Automated submodule bump from .github/workflows/update_llvm_dependent_submodules.yml

Additional Changes:

- Replace `MhloLhloToLinalg` with `MhloToLinalg` in cmake files due to upstream changes.

PiperOrigin-RevId: 416353534
diff --git a/build_tools/bazel_to_cmake/bazel_to_cmake_targets.py b/build_tools/bazel_to_cmake/bazel_to_cmake_targets.py
index 5fdfda5..4eb76a1 100644
--- a/build_tools/bazel_to_cmake/bazel_to_cmake_targets.py
+++ b/build_tools/bazel_to_cmake/bazel_to_cmake_targets.py
@@ -94,7 +94,7 @@
     ],
     "@mlir-hlo//:legalize_to_linalg": [
         "tensorflow::external_mhlo_includes",
-        "MhloLhloToLinalg",
+        "MhloToLinalg",
     ],
     "@mlir-hlo//:legalize_to_standard": [
         "tensorflow::external_mhlo_includes",
diff --git a/iree/compiler/InputConversion/MHLO/CMakeLists.txt b/iree/compiler/InputConversion/MHLO/CMakeLists.txt
index bf40b06..ede7807 100644
--- a/iree/compiler/InputConversion/MHLO/CMakeLists.txt
+++ b/iree/compiler/InputConversion/MHLO/CMakeLists.txt
@@ -80,7 +80,7 @@
     MLIRTensor
     MLIRTransforms
     MhloDialect
-    MhloLhloToLinalg
+    MhloToLinalg
     MhloPasses
     MhloToStandard
     iree::compiler::Dialect::Flow::IR