Optinally allow change prefix in Slip21 Owner path

[peter-sanderson]

Methods createAppOwner and createOwner can accept optional pathPrefix parameter which defaults to ['Evolu'] to prevent doubling of the Evolu path node in usecase, when Evolu is already passed down from external source (in our case Trezor Device).

We have a way around, its just for convenience to not duplicate Evolus code.

See: https://github.com/trezor/trezor-suite/pull/22911/files#diff-a0257068a0719b3d64a1a27cd938856f0be8d39c799b5908af51567d30612d18R28