Synchronize submodules with LLVM at llvm/llvm-project@a7b1872593db

Updates LLVM dependencies to match
[a7b1872593db](https://github.com/llvm/llvm-project/commit/a7b1872593db).
- TensorFlow to
[908116d4231c](https://github.com/tensorflow/tensorflow/commit/908116d4231c)
- MLIR-HLO to
[08e1fdad829a](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

PiperOrigin-RevId: 407872701
diff --git a/SUBMODULE_VERSIONS.txt b/SUBMODULE_VERSIONS.txt
index f229764..ab0c9fb 100644
--- a/SUBMODULE_VERSIONS.txt
+++ b/SUBMODULE_VERSIONS.txt
@@ -5,13 +5,13 @@
 88b845dee001723c4a0db1fe5477de735b6d3bb0 third_party/liburing
 acd6f6f014c25e46363e718381e0b35205df2d83 third_party/libyaml
 a7b1872593db1688c4e651f1ed8be578898d7c43 third_party/llvm-project
-a9e6ab10c01b2892b88727af65220ba9e53fdde5 third_party/mlir-hlo
+08e1fdad829ad298f24e83d33e67901edbec81da third_party/mlir-hlo
 3f701faace7addc75d16dea8a6cd769fa5b3f260 third_party/musl
 4c7697dbe973ed01ae6fbec37d186ebd05982e1f third_party/pybind11
 2e1b5fb39ebc2ef4cb77005f8267e4f3a6241ba1 third_party/spirv_cross
 f5417a4b6633c3217c9a1bc2f0c70b1454975ba7 third_party/spirv_headers
 b42009b3b9d4ca35bc703f5310eedc74f584be58 third_party/stblib
-de6fb84706f4e99cce6dc51ca8fc6ea23b3c16f4 third_party/tensorflow
+908116d4231cf874c603f2b0591b66673603ea9e third_party/tensorflow
 058e89011fceca912d43638ebb6b85992147fcfe third_party/tracy
 9d10a96f2d57c3c37e167f2e73c9a31ac2e51fa5 third_party/vulkan_headers
 8d4a9e9174a9c6ad6a3a3ae981b915ef13fc12c4 third_party/vulkan_memory_allocator
diff --git a/third_party/mlir-hlo b/third_party/mlir-hlo
index a9e6ab1..08e1fda 160000
--- a/third_party/mlir-hlo
+++ b/third_party/mlir-hlo
@@ -1 +1 @@
-Subproject commit a9e6ab10c01b2892b88727af65220ba9e53fdde5
+Subproject commit 08e1fdad829ad298f24e83d33e67901edbec81da
diff --git a/third_party/tensorflow b/third_party/tensorflow
index de6fb84..908116d 160000
--- a/third_party/tensorflow
+++ b/third_party/tensorflow
@@ -1 +1 @@
-Subproject commit de6fb84706f4e99cce6dc51ca8fc6ea23b3c16f4
+Subproject commit 908116d4231cf874c603f2b0591b66673603ea9e