Add back options argument in the ActiveRecord::Base.initialize method

This will make easier to hook protected_attributes gem in our code
without making that gem fragile to change in Rails code base.

Closes #12243

activerecord/lib/active_record/core.rb

@@ -163,7 +163,7 @@ def relation #:nodoc:
     # ==== Example:
     #   # Instantiates a single new object
     #   User.new(first_name: 'Jamie')
-    def initialize(attributes = nil)
+    def initialize(attributes = nil, options = {})
       defaults = self.class.column_defaults.dup
       defaults.each { |k, v| defaults[k] = v.dup if v.duplicable? }
 
@@ -176,7 +176,9 @@ def initialize(attributes = nil)
       ensure_proper_type
       populate_with_current_scope_attributes
 
-      assign_attributes(attributes) if attributes
+      # +options+ argument is only needed to make protected_attributes gem easier to hook.
+      # Remove it when we drop support to this gem.
+      init_attributes(attributes, options) if attributes
 
       yield self if block_given?
       run_callbacks :initialize unless _initialize_callbacks.empty?
@@ -432,5 +434,11 @@ def init_changed_attributes
         @changed_attributes[attr] = orig_value if _field_changed?(attr, orig_value, @attributes[attr])
       end
     end
+
+    # This method is needed to make protected_attributes gem easier to hook.
+    # Remove it when we drop support to this gem.
+    def init_attributes(attributes, options)
+      assign_attributes(attributes)
+    end
   end
 end