Integrate LLVM at 21473462f762a9a2d3140eb8ecaea034f83d9a7c (#4245)

Update LLVM to
llvm/llvm-project@2147346

Update StableHLO to
openxla/stablehlo@9018c68.

This commit also moves 2 of the tests that were failing earlier from the
fail to the crash set.

Signed-off-by: Vivek Khandelwal <[email protected]>

Author: vivekkhandelwal1

externals/llvm-project

@@ -415,7 +415,6 @@
     "AtenNonzero1DDynamicModule_basic",  # no lowering for torch.aten.sym_constrain_range_for_size
     "Aten_TrilinearModuleVaryingRanks_basic",
     "Aten_TrilinearModuleZerodDimBug_basic",
-    "AvgPool2dCHWModule_basic",
     "QuantizedReluInt32_basic",
     "QuantizedReluInt8_basic",
     "QuantizedReluUint8_basic",
@@ -502,7 +501,6 @@
     "AdaptiveAvgPool1dGeneralDynamic_basic",
     "AdaptiveAvgPool1dStaticEvenMultiple_basic",
     "AdaptiveAvgPool1dStaticLargerOutput_basic",
-    "AdaptiveAvgPool2dDynamicNoBatch_basic",
     "AdaptiveAvgPool2dDynamic_basic",
     "AdaptiveMaxPool1dDynamicNoBatch_basic",
     "AdaptiveMaxPool1dDynamic_basic",
@@ -545,6 +543,8 @@
     "AvgPool2dSingleIntTupleParamsModule_basic",
     "SliceOutOfLowerBoundEndIndexModule_basic",
     "RollModule_basic",
+    "AdaptiveAvgPool2dDynamicNoBatch_basic",
+    "AvgPool2dCHWModule_basic",
 }
 
 FX_IMPORTER_STABLEHLO_XFAIL_SET = {