[PM-16603] Add userkey rotation v2 (#5204)

* Implement userkey rotation v2

* Update request models

* Cleanup

* Update tests

* Improve test

* Add tests

* Fix formatting

* Fix test

* Remove whitespace

* Fix namespace

* Enable nullable on models

* Fix build

* Add tests and enable nullable on masterpasswordunlockdatamodel

* Fix test

* Remove rollback

* Add tests

* Make masterpassword hint optional

* Update user query

* Add EF test

* Improve test

* Cleanup

* Set masterpassword hint

* Remove connection close

* Add tests for invalid kdf types

* Update test/Core.Test/KeyManagement/UserKey/RotateUserAccountKeysCommandTests.cs

Co-authored-by: Thomas Avery <43214426+Thomas-Avery@users.noreply.github.com>

* Fix formatting

* Update src/Api/KeyManagement/Models/Requests/RotateAccountKeysAndDataRequestModel.cs

Co-authored-by: Thomas Avery <43214426+Thomas-Avery@users.noreply.github.com>

* Update src/Api/Auth/Models/Request/Accounts/MasterPasswordUnlockDataModel.cs

Co-authored-by: Thomas Avery <43214426+Thomas-Avery@users.noreply.github.com>

* Update src/Api/Auth/Models/Request/Accounts/MasterPasswordUnlockDataModel.cs

Co-authored-by: Thomas Avery <43214426+Thomas-Avery@users.noreply.github.com>

* Update src/Api/KeyManagement/Models/Requests/AccountKeysRequestModel.cs

Co-authored-by: Thomas Avery <43214426+Thomas-Avery@users.noreply.github.com>

* Fix imports

* Fix tests

* Remove null check

* Add rollback

---------

Co-authored-by: Thomas Avery <43214426+Thomas-Avery@users.noreply.github.com>

test/Core.Test/KeyManagement/UserKey/RotateUserKeyCommandTests.cs

@@ -11,7 +11,7 @@ using Microsoft.AspNetCore.Identity;
 using NSubstitute;
 using Xunit;
 
-namespace Bit.Core.Test.KeyManagement.UserFeatures.UserKey;
+namespace Bit.Core.Test.KeyManagement.UserKey;
 
 [SutProviderCustomize]
 public class RotateUserKeyCommandTests