Disable consistently failing RadioButtons.AccessKeys test

[DmitriyKomin]

RadioButtons.AccessKeys is failing consistently. Lab failures appear to start on 9/26/23 (no passing history observed prior, newly enabled?):
Pipelines - Run WinUI-Public-MUX-CI_2310.18001 (azure.com)

Disabling to unblock other checkins, opened ADO item for investigation:
ADO Bug 47130840: [WinUI2] RadioButtons.AccessKeys test is failing.

Also fails locally:

StartGroup: Windows.UI.Xaml.Tests.MUXControls.InteractionTests.RadioButtonsTests.AccessKeys
Left-click on __CurrentPage.
RadioButtons Tests initializing TestSetupHelper
Waiting until __TestContentLoadedCheckBox to be checked by test app.
__TestContentLoadedCheckBox checkbox checked, page has loaded
RadioButtons Test initializing TestSetupHelper
Waiting until __TestContentLoadedCheckBox to be checked by test app.
__TestContentLoadedCheckBox checkbox checked, page has loaded
Find the SourceComboBox
Verify: IsNotNull(Microsoft.Windows.Apps.Test.Foundation.Controls.ComboBox)
ComboBox.SelectItemByName: Number of items: 2
ComboBox.SelectItemByName: item = ItemsComboBoxItem
ComboBox.SelectItemByName: Selecting item {ItemsComboBoxItem, ComboBoxItem, ItemsComboBoxItem}
Find the ItemTypeComboBox
Verify: IsNotNull(Microsoft.Windows.Apps.Test.Foundation.Controls.ComboBox)
ComboBox.SelectItemByName: Number of items: 2
ComboBox.SelectItemByName: item = StringsComboBoxItem
ComboBox.SelectItemByName: Selecting item {StringsComboBoxItem, ComboBoxItem, StringsComboBoxItem}
Find the NumberOfItemsTextBlock
Verify: IsNotNull(Microsoft.Windows.Apps.Test.Foundation.Controls.Edit)
Find the SetNumberOfItemsButton
Verify: IsNotNull(Microsoft.Windows.Apps.Test.Foundation.Controls.Button)
Find the RadioButtonsHasFocusCheckBox
Verify: IsNotNull(Microsoft.Windows.Apps.Test.Foundation.Controls.CheckBox)
Verify: AreEqual(False, False)
Send text '{ALT DOWN}'.
Send text '{R}'.
Send text '{ALT UP}'.
Find the FocusedIndexTextBlock
Verify: IsNotNull(Microsoft.Windows.Apps.Test.Foundation.Controls.TextBlock)
Error: Verify: AreEqual(0, -1) [File: C:\a\_work\1\s\dev\RadioButtons\InteractionTests\RadioButtonsTests.cs, Function: VerifyFocusedIndex, Line: 977]
Going to the previous page...
Invoking the back button...
Invoke successful.
Going to the previous page...
Invoking the back button...
Invoke successful.
EndGroup: Windows.UI.Xaml.Tests.MUXControls.InteractionTests.RadioButtonsTests.AccessKeys [Failed]

[ojhad]

Closing since this change went in as part of this PR: #8969