fix(NcListItem) don't force blur action menu on tab

[Antreesy]

☑️ Resolves

• Fix Can no longer tab over conversation to the group/user list nextcloud/spreed#10341
• When current focus is on NcActions menu buton, it works fine natively, so we don't need to blur it (which triggers focus-trap to return back to the previous focused element)
• Works before this fix: fix(NcListItem) - define a single place for NcActions to render #4356, because focus didn't leave <a/> tag before

🖼️ Screenshots

🏚️ Before

Screencast.from.24.08.2023.12.01.27.webm

🏡 After

Screencast.from.24.08.2023.11.57.53.webm

🚧 Tasks

• Visual check
• Code review

🏁 Checklist

• ⛑️ Tests are included or are not applicable
• 📘 Component documentation has been extended, updated or is not applicable

[nickvergessen]

/backport to stable7

[szaimen]

LGTM from the screenrecording