Fix NpgsqlCharacterStringTypeMapping for compiled model

Fixed in main in #3089

Fixes #2974

src/EFCore.PG/Storage/Internal/Mapping/NpgsqlCharacterStringTypeMapping.cs

@@ -122,7 +122,13 @@ protected override void ConfigureParameter(DbParameter parameter)
         base.ConfigureParameter(parameter);
     }
 
-    private static bool EqualsWithoutTrailingWhitespace(string? a, string? b)
+    /// <summary>
+    ///     This is an internal API that supports the Entity Framework Core infrastructure and not subject to
+    ///     the same compatibility standards as public APIs. It may be changed or removed without notice in
+    ///     any release. You should only use it directly in your code with extreme caution and knowing that
+    ///     doing so can result in application failures when updating to a new Entity Framework Core release.
+    /// </summary>
+    public static bool EqualsWithoutTrailingWhitespace(string? a, string? b)
         => (a, b) switch
         {
             (null, null) => true,
@@ -131,6 +137,12 @@ private static bool EqualsWithoutTrailingWhitespace(string? a, string? b)
             _ => a.AsSpan().TrimEnd().SequenceEqual(b.AsSpan().TrimEnd())
         };
 
-    private static int GetHashCodeWithoutTrailingWhitespace(string a)
+    /// <summary>
+    ///     This is an internal API that supports the Entity Framework Core infrastructure and not subject to
+    ///     the same compatibility standards as public APIs. It may be changed or removed without notice in
+    ///     any release. You should only use it directly in your code with extreme caution and knowing that
+    ///     doing so can result in application failures when updating to a new Entity Framework Core release.
+    /// </summary>
+    public static int GetHashCodeWithoutTrailingWhitespace(string a)
         => a.TrimEnd().GetHashCode();
 }