Use UTC for system dates in Umbraco (#19822)

* Persist and expose Umbraco system dates as UTC (#19705)

* Updated persistence DTOs defining default dates to use UTC.

* Remove ForceToUtc = false from all persistence DTO attributes (default when not specified is true).

* Removed use of SpecifyKind setting dates to local.

* Removed unnecessary Utc suffixes on properties.

* Persist current date time with UtcNow.

* Removed further necessary Utc suffixes and fixed failing unit tests.

* Added migration for SQL server to update database date default constraints.

* Added comment justifying not providing a migration for SQLite default date constraints.

* Ensure UTC for datetimes created from persistence DTOs.

* Ensure UTC when creating dates for published content rendering in Razor and outputting in delivery API.

* Fixed migration SQL syntax.

* Introduced AuditItemFactory for creating entries for the backoffice document history, so we can control the UTC setting on the retrieved persisted dates.

* Ensured UTC dates are retrieved for document versions.

* Ensured UTC is returned for backoffice display of last edited and published for variant content.

* Fixed SQLite syntax for default current datetime.

* Apply suggestions from code review

Co-authored-by: Laura Neto <12862535+lauraneto@users.noreply.github.com>

* Further updates from code review.

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Co-authored-by: Laura Neto <12862535+lauraneto@users.noreply.github.com>

* Migrate system dates from local server time to UTC (#19798)

* Add settings for the migration.

* Add migration and implement for SQL server.

* Implement for SQLite.

* Fixes from testing with SQL Server.

* Fixes from testing with SQLite.

* Code tidy.

* Cleaned up usings.

* Removed audit log date from conversion.

* Removed webhook log date from conversion.

* Updated update date initialization on saving dictionary items.

* Updated filter on log queries.

* Use timezone ID instead of system name to work cross-culture.

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Co-authored-by: Laura Neto <12862535+lauraneto@users.noreply.github.com>

src/Umbraco.Web.Common/Security/UmbracoSignInManager.cs

@@ -351,7 +351,7 @@ public abstract class UmbracoSignInManager<TUser> : SignInManager<TUser>
         if (result.Succeeded)
         {
             // track the last login date
-            user!.LastLoginDateUtc = DateTime.UtcNow;
+            user!.LastLoginDate = DateTime.UtcNow;
             if (user.AccessFailedCount > 0)
             {
                 // we have successfully logged in, reset the AccessFailedCount