hs: Remove the private key material from hs_descriptor.h
Basically, we need to remove the private keys from some data structure in hs_descriptor.h
. Namely:
ed25519_keypair_t signing_kp;
curve25519_keypair_t curve25519;
Those private keys should be in a dedicated data structure on the service side which we don't have yet so only put public keys there.
To upload designs, you'll need to enable LFS and have admin enable hashed storage. More information