Add visitAllocationClasses to TypeToMaskAdapter when using F14 Maps

Summary:
When using a `Mask` field in a Thrift struct that uses the plugin: thrift_plugin_allocated, it fails to compile.

This is because we need to define the traits somewhere as:
```
template <typename T>
struct allocated_size_traits<
    apache::thrift::protocol::detail::ValidatingTypeMap<T>> {
  static std::size_t allocated_bytes(
      const apache::thrift::protocol::detail::ValidatingTypeMap<T>& container,
      unsigned flags = 0U) {
    auto result =
        bytesAllocatedByRange(container.begin(), container.end(), flags);
    container.visitAllocationClasses(
        [&result](size_t const size, size_t const count) {
          result += count * bytesAllocatedForSize(size);
        });
    return result;
  }
};
```

TypeToMaskAdapter is a wrapper around F14Map (or std::map) [with private internal `map_` field] and other methods just forward to map_. So, e can define the above trait as similarly done for F14Map, but we need to add a public method `visitAllocationClasses` similar to F14Map.

Reviewed By: iahs

Differential Revision: D95068786

fbshipit-source-id: 0e4adde79d633c88ae11338c10928378af855431

Author: Mohammed Das

third-party/thrift/src/thrift/lib/thrift/TypeToMaskAdapter.h

@@ -32,6 +32,10 @@ class ValidatingTypeMap {
 #if FOLLY_F14_VECTOR_INTRINSICS_AVAILABLE
   using map_type = folly::F14VectorMap<type::Type, Mask>;
   void reserve(std::size_t n) { map_.reserve(n); }
+  template <typename V>
+  void visitAllocationClasses(V&& visitor) const {
+    return map_.visitAllocationClasses(std::forward<V>(visitor));
+  }
 #else
   // f14 map is not available in some platforms. Default to std::map which is
   // able to handle incomplete types