Correct interface name for require api type-only

The interface name for require api type-only uses default prefix
which is not correct.
To make sure interface name generated correctly, the alias should
be used as prefix.

Resolves: LE-12988
Change-Id: I73bc757e0b72107ffd5fa294ba197ef4e0383577

framework/tools/defTools/conceptualModel/api.cpp

@@ -378,7 +378,7 @@ const
 {
     std::string codeGenDir = path::Combine(apiFilePtr->codeGenDir, "client/");
 
-    cFiles.interfaceFile = codeGenDir + apiFilePtr->defaultPrefix + "_interface.h";
+    cFiles.interfaceFile = codeGenDir + internalName + "_interface.h";
     cFiles.internalHFile = "";
     cFiles.sourceFile = "";
     cFiles.objectFile = "";