[cling] Update policy for GetFullyQualifiedName in cling utils

Just like in CppInterOp, set the `SuppressElaboration` and
`FullyQualifiedName` policies when getting the fully qualified name of a
QualType.

Closes the following JIRA ticket:

https://its.cern.ch/jira/browse/ROOT-10150

Author: guitargeek

interpreter/cling/lib/Utils/AST.cpp

@@ -1762,6 +1762,8 @@ namespace utils {
     PrintingPolicy Policy(Ctx.getPrintingPolicy());
     Policy.SuppressScope = false;
     Policy.AnonymousTagLocations = false;
+    Policy.SuppressElaboration = true;
+    Policy.FullyQualifiedName = true;
     return FQQT.getAsString(Policy);
   }
 

roottest/root/meta/CMakeLists.txt

@@ -38,6 +38,10 @@ ROOTTEST_ADD_TEST(loadernotapp
                   OUTREF loadernotapp.ref
                   DEPENDS ${GENERATE_EXECUTABLE_TEST})
 
+ROOTTEST_ADD_TEST(reproduceROOT10150
+                  MACRO reproduceROOT10150.C+
+                  FAILREGEX "error")
+
 ROOTTEST_COMPILE_MACRO(fornamespace.C)
 
 #---Copy from source to binary some of the files

roottest/root/meta/reproduceROOT10150.C

@@ -0,0 +1,28 @@
+// reproducer from https://its.cern.ch/jira/browse/ROOT-10150
+
+#include <TInterpreter.h>
+#include <functional>
+#include <iostream>
+
+namespace Foo {
+struct Particle {
+   float m_pt;
+   float pt() const { return m_pt; }
+};
+} // namespace Foo
+
+template <typename FType>
+FType get_functor(std::string const &functor_string)
+{
+   auto intern = gInterpreter->MakeInterpreterValue();
+   gInterpreter->Evaluate(functor_string.c_str(), *intern);
+   return *static_cast<FType *>(intern->GetAsPointer());
+}
+
+void reproduceROOT10150()
+{
+   auto functor = get_functor<std::function<bool(Foo::Particle const &)>>(
+      "std::function<bool(Foo::Particle const&)>( [](Foo::Particle const& particle){return particle.pt() > 15;} );");
+   Foo::Particle low_pT_particle{1.f}, high_pT_particle{40.f};
+   std::cout << functor(high_pT_particle) << " " << functor(low_pT_particle) << std::endl;
+}