Fix method override warning in profiler (#4549)

Author: p-datadog

lib/datadog/profiling.rb

@@ -78,8 +78,11 @@ def self.wait_until_running(timeout_seconds: 5)
     end
 
     private_class_method def self.replace_noop_allocation_count
-      def self.allocation_count # rubocop:disable Lint/NestedMethodDefinition (On purpose!)
-        Datadog::Profiling::Collectors::CpuAndWallTimeWorker._native_allocation_count
+      class << self
+        remove_method :allocation_count
+        def allocation_count
+          Datadog::Profiling::Collectors::CpuAndWallTimeWorker._native_allocation_count
+        end
       end
     end