[mathmore] Explicitly alias Integration::Type

Explicitly define ROOT::Math::Integration::Type with a using
declaration.

In LLVM 22, the existing using namespace directive no longer
implicitly resolves these types during dictionary generation, causing
rootcling to fail with:

```
Error in <CloseStreamerInfoROOTFile>: Cannot find enum ROOT::Math::Integration::Type.
```

Author: devajithvs

math/mathmore/inc/Math/IntegrationTypes.h

@@ -42,6 +42,7 @@ namespace Math {
   namespace Integration {
 
      using namespace IntegrationOneDim;
+    using Type = IntegrationOneDim::Type;
 
 
 //     // type of integration

math/mathmore/inc/Math/MCIntegrationTypes.h

@@ -40,6 +40,7 @@ namespace Math {
 
 
      using namespace IntegrationMultiDim;
+    using Type = IntegrationMultiDim::Type;
 
 
     // type of integration