Fix Regression in Numericality Validations

A regression (#22744) introduced in 7500dae caused certain numericality
validations to raise an error when run against an attribute with a
string value. Previously, these validations would successfully run
against string values because the value was cast to a numeric class.

This commit resolves the regression by converting string values to
floats before performing numericality comparison validations.

[fixes #22744]

activemodel/lib/active_model/validations/numericality.rb

@@ -39,6 +39,10 @@ module ActiveModel
           return
         end
 
+        if raw_value.is_a?(String)
+          value = parse_raw_value_as_a_number(raw_value)
+        end
+
         options.slice(*CHECKS.keys).each do |option, option_value|
           case option
           when :odd, :even
@@ -63,12 +67,15 @@ module ActiveModel
     protected
 
       def is_number?(raw_value)
-        parsed_value = Kernel.Float(raw_value) if raw_value !~ /\A0[xX]/
-        !parsed_value.nil?
+        !parse_raw_value_as_a_number(raw_value).nil?
       rescue ArgumentError, TypeError
         false
       end
 
+      def parse_raw_value_as_a_number(raw_value)
+        Kernel.Float(raw_value) if raw_value !~ /\A0[xX]/
+      end
+
       def is_integer?(raw_value)
         /\A[+-]?\d+\z/ === raw_value.to_s
       end