Revert "Making Culture Invariant When Validating Date to negate deferent formats (#17257)"

This reverts commit dabaeac.

# Conflicts:
#	src/Umbraco.Core/PropertyEditors/Validators/DateTimeValidator.cs
#	tests/Umbraco.Tests.UnitTests/Umbraco.Core/PropertyEditors/Validators/DateTimeValidatorTests.cs

Author: nul800sebastiaan

src/Umbraco.Core/PropertyEditors/Validators/DateTimeValidator.cs

@@ -1,5 +1,4 @@
 using System.ComponentModel.DataAnnotations;
-using System.Globalization;
 using Umbraco.Cms.Core.Models.Validation;
 using Umbraco.Extensions;
 
@@ -26,7 +25,7 @@ public IEnumerable<ValidationResult> Validate(object? value, string? valueType,
             yield break;
         }
 
-        if (DateTime.TryParse(value.ToString(), CultureInfo.InvariantCulture, out DateTime dt) == false)
+        if (DateTime.TryParse(value.ToString(), out DateTime dt) == false)
         {
             yield return new ValidationResult(
                 $"The string value {value} cannot be parsed into a DateTime",