[OpenMP] Fix compile error caused by #74397 (#75419)
This patch fixed the following compile error caused by #74397.
```
openmp/libomptarget/src/PluginManager.cpp: In static member function ‘static llvm::Expected<std::unique_ptr<PluginAdaptorTy> >
PluginAdaptorTy::create(const string&)’:
openmp/libomptarget/src/PluginManager.cpp:50:10: error: could not convert ‘PluginAdaptor’ from ‘std::unique_ptr<PluginAdaptorTy
>’ to ‘llvm::Expected<std::unique_ptr<PluginAdaptorTy> >’
return PluginAdaptor; ^~~~~~~~~~~~~
```
GitOrigin-RevId: 54b54d63caa8b672cbc97fe291ad1b4e4f5895a6
1 file changed