[Fix][LLVM] Fix getHostCPUFeatures LLVM version cutoff (#17403)

This PR fixes the LLVM version cutoff for `llvm::sys::getHostCPUFeatures`.
Previously the cutoff version is set to 20.0, assuming that the
signature change happens since LLVM 20.0.
While actually the signature change happens at 19.0.

Reference:
* LLVM 18.1.8 https://github.com/llvm/llvm-project/blob/llvmorg-18.1.8/llvm/include/llvm/TargetParser/Host.h#L56
* LLVM 19.1.0 https://github.com/llvm/llvm-project/blob/llvmorg-19.1.0-rc1/llvm/include/llvm/TargetParser/Host.h#L55

src/target/llvm/codegen_llvm.cc

@@ -2315,7 +2315,7 @@ TVM_REGISTER_GLOBAL("tvm.codegen.llvm.GetHostCPUName").set_body_typed([]() -> st
 
 TVM_REGISTER_GLOBAL("tvm.codegen.llvm.GetHostCPUFeatures")
     .set_body_typed([]() -> Map<String, IntImm> {
-#if TVM_LLVM_VERSION >= 200
+#if TVM_LLVM_VERSION >= 190
       Map<String, IntImm> ret;
       auto features = llvm::sys::getHostCPUFeatures();
       for (auto it = features.begin(); it != features.end(); ++it) {