Raise a better exception when a invalid depreation behavior is set

Fixes #32928.

activesupport/lib/active_support/deprecation/behaviors.rb

@@ -94,6 +94,10 @@ module ActiveSupport
 
       private
         def arity_coerce(behavior)
+          unless behavior.respond_to?(:call)
+            raise ArgumentError, "#{behavior.inspect} is not a valid deprecation behavior."
+          end
+
           if behavior.arity == 4 || behavior.arity == -1
             behavior
           else

activesupport/test/deprecation_test.rb

@@ -182,6 +182,14 @@ class DeprecationTest < ActiveSupport::TestCase
     end
   end
 
+  def test_default_invalid_behavior
+    e = assert_raises(ArgumentError) do
+      ActiveSupport::Deprecation.behavior = :invalid
+    end
+
+    assert_equal ":invalid is not a valid deprecation behavior.", e.message
+  end
+
   def test_deprecated_instance_variable_proxy
     assert_not_deprecated { @dtc.request.size }