[HIPIFY] Narrow cudaKernelCallExpr matcher.

[Explanation]
Narrow cudaKernelCallExpr matcher to isExpansionInMainFile() - to the file being actually converted (without system includes).
But as for Thrust, there are *.inl files, which are nevertheless being expanded in main file.
These files contain cuda kernel launches, which are not converted successfully by hipify, for instance:
thrust/system/cuda/detail/detail/launch_closure.inl:98:23.

[ToDo]
File a bug on cudaKernelCallExpr matcher for conversion error (thrust\examples\cuda\<any cu example>).

hipify-clang/src/Cuda2Hip.cpp

@@ -2494,7 +2494,7 @@ void addAllMatchers(ast_matchers::MatchFinder &Finder, Cuda2HipCallback *Callbac
                              callee(functionDecl(matchesName("cu.*"))))
                              .bind("cudaCall"),
                              Callback);
-  Finder.addMatcher(cudaKernelCallExpr().bind("cudaLaunchKernel"), Callback);
+  Finder.addMatcher(cudaKernelCallExpr(isExpansionInMainFile()).bind("cudaLaunchKernel"), Callback);
   Finder.addMatcher(memberExpr(isExpansionInMainFile(),
                                hasObjectExpression(hasType(cxxRecordDecl(
                                matchesName("__cuda_builtin_")))))