[llvm] [SPIRV] Start adding support for `int128` (PR #170798)

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``````````bash
git-clang-format --diff origin/main HEAD --extensions cpp -- llvm/lib/Target/SPIRV/MCTargetDesc/SPIRVInstPrinter.cpp llvm/lib/Target/SPIRV/SPIRVGlobalRegistry.cpp llvm/lib/Target/SPIRV/SPIRVLegalizerInfo.cpp llvm/lib/Target/SPIRV/SPIRVModuleAnalysis.cpp llvm/lib/Target/SPIRV/SPIRVUtils.cpp --diff_from_common_commit
``````````

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``````````diff
diff --git a/llvm/lib/Target/SPIRV/SPIRVModuleAnalysis.cpp b/llvm/lib/Target/SPIRV/SPIRVModuleAnalysis.cpp
index 832139f7d..db84da333 100644
--- a/llvm/lib/Target/SPIRV/SPIRVModuleAnalysis.cpp
+++ b/llvm/lib/Target/SPIRV/SPIRVModuleAnalysis.cpp
@@ -1403,7 +1403,7 @@ void addInstrRequirements(const MachineInstr &MI,
             "requires the following SPIR-V extension: "
             "SPV_ALTERA_arbitrary_precision_integers");
       Reqs.addExtension(
-              SPIRV::Extension::SPV_ALTERA_arbitrary_precision_integers);
+          SPIRV::Extension::SPV_ALTERA_arbitrary_precision_integers);
       Reqs.addCapability(SPIRV::Capability::ArbitraryPrecisionIntegersALTERA);
     }
     break;

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https://github.com/llvm/llvm-project/pull/170798