[release/8.0] Fix nullable annotation for Validator.TryValidateValue and ValidateValue (#91293)

* Fix nullable annotation for Validator.TryValidateValue and ValidateValue

* Revert Options source generator nullable annotation changes for Validator.TryValidateValue (#91305)

* Fix nullable annotation for Validator.ValidateValue ref source (#91351)

---------
Co-authored-by: NJeff Handley <jeffhandley@users.noreply.github.com>

src/libraries/System.ComponentModel.Annotations/ref/System.ComponentModel.Annotations.cs

@@ -387,14 +387,14 @@ public static partial class Validator
         public static bool TryValidateObject(object instance, System.ComponentModel.DataAnnotations.ValidationContext validationContext, System.Collections.Generic.ICollection<System.ComponentModel.DataAnnotations.ValidationResult>? validationResults, bool validateAllProperties) { throw null; }
         [System.Diagnostics.CodeAnalysis.RequiresUnreferencedCodeAttribute("The Type of validationContext.ObjectType cannot be statically discovered.")]
         public static bool TryValidateProperty(object? value, System.ComponentModel.DataAnnotations.ValidationContext validationContext, System.Collections.Generic.ICollection<System.ComponentModel.DataAnnotations.ValidationResult>? validationResults) { throw null; }
-        public static bool TryValidateValue(object value, System.ComponentModel.DataAnnotations.ValidationContext validationContext, System.Collections.Generic.ICollection<System.ComponentModel.DataAnnotations.ValidationResult>? validationResults, System.Collections.Generic.IEnumerable<System.ComponentModel.DataAnnotations.ValidationAttribute> validationAttributes) { throw null; }
+        public static bool TryValidateValue(object? value, System.ComponentModel.DataAnnotations.ValidationContext validationContext, System.Collections.Generic.ICollection<System.ComponentModel.DataAnnotations.ValidationResult>? validationResults, System.Collections.Generic.IEnumerable<System.ComponentModel.DataAnnotations.ValidationAttribute> validationAttributes) { throw null; }
         [System.Diagnostics.CodeAnalysis.RequiresUnreferencedCodeAttribute("The Type of instance cannot be statically discovered and the Type's properties can be trimmed.")]
         public static void ValidateObject(object instance, System.ComponentModel.DataAnnotations.ValidationContext validationContext) { }
         [System.Diagnostics.CodeAnalysis.RequiresUnreferencedCodeAttribute("The Type of instance cannot be statically discovered and the Type's properties can be trimmed.")]
         public static void ValidateObject(object instance, System.ComponentModel.DataAnnotations.ValidationContext validationContext, bool validateAllProperties) { }
         [System.Diagnostics.CodeAnalysis.RequiresUnreferencedCodeAttribute("The Type of validationContext.ObjectType cannot be statically discovered.")]
         public static void ValidateProperty(object? value, System.ComponentModel.DataAnnotations.ValidationContext validationContext) { }
-        public static void ValidateValue(object value, System.ComponentModel.DataAnnotations.ValidationContext validationContext, System.Collections.Generic.IEnumerable<System.ComponentModel.DataAnnotations.ValidationAttribute> validationAttributes) { }
+        public static void ValidateValue(object? value, System.ComponentModel.DataAnnotations.ValidationContext validationContext, System.Collections.Generic.IEnumerable<System.ComponentModel.DataAnnotations.ValidationAttribute> validationAttributes) { }
     }
 }
 namespace System.ComponentModel.DataAnnotations.Schema

src/libraries/System.ComponentModel.Annotations/src/System/ComponentModel/DataAnnotations/Validator.cs

@@ -171,7 +171,7 @@ public static class Validator
         ///         then all validators will be evaluated.
         ///     </para>
         /// </remarks>
-        /// <param name="value">The value to test.  It cannot be null.</param>
+        /// <param name="value">The value to test.</param>
         /// <param name="validationContext">
         ///     Describes the object being validated and provides services and context for the
         ///     validators.
@@ -182,7 +182,7 @@ public static class Validator
         ///     <paramref name="value" /> against.
         /// </param>
         /// <returns><c>true</c> if the object is valid, <c>false</c> if any validation errors are encountered.</returns>
-        public static bool TryValidateValue(object value, ValidationContext validationContext,
+        public static bool TryValidateValue(object? value, ValidationContext validationContext,
             ICollection<ValidationResult>? validationResults, IEnumerable<ValidationAttribute> validationAttributes)
         {
             ArgumentNullException.ThrowIfNull(validationAttributes);
@@ -303,12 +303,12 @@ public static void ValidateObject(object instance, ValidationContext validationC
         ///         first.
         ///     </para>
         /// </remarks>
-        /// <param name="value">The value to test.  It cannot be null.</param>
+        /// <param name="value">The value to test.</param>
         /// <param name="validationContext">Describes the object being tested.</param>
         /// <param name="validationAttributes">The list of <see cref="ValidationAttribute" />s to validate against this instance.</param>
         /// <exception cref="ArgumentNullException">When <paramref name="validationContext" /> is null.</exception>
         /// <exception cref="ValidationException">When <paramref name="value" /> is found to be invalid.</exception>
-        public static void ValidateValue(object value, ValidationContext validationContext,
+        public static void ValidateValue(object? value, ValidationContext validationContext,
             IEnumerable<ValidationAttribute> validationAttributes)
         {
             ArgumentNullException.ThrowIfNull(validationContext);