[llvm] [mlir] [OpenMP][IRBuilder] Handle `target ... nowait` when codegen targets host (PR #124720)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `flang-aarch64-dylib` running on `linaro-flang-aarch64-dylib` while building `llvm,mlir` at step 5 "build-unified-tree".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/50/builds/9504

<details>
<summary>Here is the relevant piece of the build log for the reference</summary>

```
Step 5 (build-unified-tree) failure: build (failure)
...
1035.349 [1279/1/5546] Building CXX object tools/mlir/lib/Target/LLVMIR/Dialect/GPU/CMakeFiles/obj.MLIRGPUToLLVMIRTranslation.dir/GPUToLLVMIRTranslation.cpp.o
1035.508 [1278/1/5547] Building CXX object tools/mlir/lib/Target/LLVMIR/Dialect/AMX/CMakeFiles/obj.MLIRAMXToLLVMIRTranslation.dir/AMXToLLVMIRTranslation.cpp.o
1035.603 [1277/1/5548] Building CXX object tools/mlir/lib/Target/LLVMIR/Dialect/Builtin/CMakeFiles/obj.MLIRBuiltinToLLVMIRTranslation.dir/BuiltinToLLVMIRTranslation.cpp.o
1035.916 [1276/1/5549] Building CXX object tools/mlir/lib/Target/LLVMIR/Dialect/NVVM/CMakeFiles/obj.MLIRLLVMIRToNVVMTranslation.dir/LLVMIRToNVVMTranslation.cpp.o
1036.292 [1275/1/5550] Building CXX object tools/mlir/lib/Target/LLVMIR/Dialect/LLVMIR/CMakeFiles/obj.MLIRLLVMIRToLLVMTranslation.dir/LLVMIRToLLVMTranslation.cpp.o
1036.372 [1274/1/5551] Building CXX object tools/mlir/lib/Target/LLVMIR/Dialect/LLVMIR/CMakeFiles/obj.MLIRLLVMToLLVMIRTranslation.dir/LLVMToLLVMIRTranslation.cpp.o
1036.462 [1273/1/5552] Building CXX object tools/mlir/lib/Target/LLVMIR/Dialect/OpenACC/CMakeFiles/obj.MLIROpenACCToLLVMIRTranslation.dir/OpenACCToLLVMIRTranslation.cpp.o
1036.559 [1272/1/5553] Building CXX object tools/mlir/lib/Target/LLVMIR/Dialect/ROCDL/CMakeFiles/obj.MLIRROCDLToLLVMIRTranslation.dir/ROCDLToLLVMIRTranslation.cpp.o
1036.607 [1271/1/5554] Building CXX object tools/mlir/test/lib/IR/CMakeFiles/MLIRTestIR.dir/TestPrintNesting.cpp.o
1046.776 [1270/1/5555] Building CXX object tools/mlir/test/lib/IR/CMakeFiles/MLIRTestIR.dir/TestSideEffects.cpp.o
FAILED: tools/mlir/test/lib/IR/CMakeFiles/MLIRTestIR.dir/TestSideEffects.cpp.o 
/usr/local/bin/c++ -DGTEST_HAS_RTTI=0 -DMLIR_INCLUDE_TESTS -D_DEBUG -D_GLIBCXX_ASSERTIONS -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/home/tcwg-buildbot/worker/flang-aarch64-dylib/build/tools/mlir/test/lib/IR -I/home/tcwg-buildbot/worker/flang-aarch64-dylib/llvm-project/mlir/test/lib/IR -I/home/tcwg-buildbot/worker/flang-aarch64-dylib/build/tools/mlir/include -I/home/tcwg-buildbot/worker/flang-aarch64-dylib/llvm-project/mlir/include -I/home/tcwg-buildbot/worker/flang-aarch64-dylib/build/include -I/home/tcwg-buildbot/worker/flang-aarch64-dylib/llvm-project/llvm/include -I/home/tcwg-buildbot/worker/flang-aarch64-dylib/llvm-project/mlir/test/lib/IR/../Dialect/Test -I/home/tcwg-buildbot/worker/flang-aarch64-dylib/build/tools/mlir/test/lib/IR/../Dialect/Test -fPIC -fno-semantic-interposition -fvisibility-inlines-hidden -Werror=date-time -Werror=unguarded-availability-new -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wmissing-field-initializers -pedantic -Wno-long-long -Wc++98-compat-extra-semi -Wimplicit-fallthrough -Wcovered-switch-default -Wno-noexcept-type -Wnon-virtual-dtor -Wdelete-non-virtual-dtor -Wsuggest-override -Wstring-conversion -Wmisleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -ffunction-sections -fdata-sections -Wundef -Werror=mismatched-tags -O3 -DNDEBUG -std=c++17  -fno-exceptions -funwind-tables -fno-rtti -UNDEBUG -MD -MT tools/mlir/test/lib/IR/CMakeFiles/MLIRTestIR.dir/TestSideEffects.cpp.o -MF tools/mlir/test/lib/IR/CMakeFiles/MLIRTestIR.dir/TestSideEffects.cpp.o.d -o tools/mlir/test/lib/IR/CMakeFiles/MLIRTestIR.dir/TestSideEffects.cpp.o -c /home/tcwg-buildbot/worker/flang-aarch64-dylib/llvm-project/mlir/test/lib/IR/TestSideEffects.cpp
In file included from /home/tcwg-buildbot/worker/flang-aarch64-dylib/llvm-project/mlir/test/lib/IR/TestSideEffects.cpp:9:
/home/tcwg-buildbot/worker/flang-aarch64-dylib/llvm-project/mlir/test/lib/IR/../Dialect/Test/TestOps.h:148:10: fatal error: 'TestOps.h.inc' file not found
  148 | #include "TestOps.h.inc"
      |          ^~~~~~~~~~~~~~~
1 error generated.
ninja: build stopped: subcommand failed.

```

</details>

https://github.com/llvm/llvm-project/pull/124720