Homogenise methods naming and arguments orders

[Ldoppea]

Methods arguments orders may be swapped between methods calls.

See https://github.com/cozy/cozy-keys-lib/blob/master/src/WebVaultClient.js#L357-L382

computeNewHashAndKeys and bitwardenChangePassword have reversed order for kdf and kdfIteration

Also this file use password wording while other apps mays use passphrase (i.e: cozy-pass-web and cozy-settings).