Workflow internal decryption mechanism is broken

[blacs30]

There has been an upstream change of the way how the decryption works or which keys to use for it.

Currently the workflow is not able to decrypt items any longer.

One PR which I found, which uses the new masterKeyEncryptedUserKey is this https://github.com/bitwarden/clients/pull/5864

Goal: fix the internal decryption, because it's a lot faster than relying on the bitwarden cli to get password/totp items.