Scripts/yes-wallet: Make it works on testnets

The following discussion from !4560 (merged) should be addressed:

• @vivienpe started a discussion: (+3 comments)

  When I try to run the command, an error is triggered. Here is how I proceed:

  rm ~/.tezos-node
  ./tezos-node config init --rpc-addr localhost --network hangzhounet
  wget https://hangzhounet.xtz-shots.io/hangzhounet-740746.rolling
  ./tezos-node snapshot import hangzhounet-740746.rolling --block BLsWaedBMvMCQ9LmfRxJfgPgTGYfnBnA2gs2PRFXmQFJSAYJyZn
  ./tezos-node run
  # I wait until the node is bootstrapped
  dune exec scripts/yes-wallet/yes_wallet.exe -- create from context ~/.tezos-node in ./yes-wallet --active-bakers-only

  Fatal error: exception Index.RO_not_allowed
  Raised at Index.Make_private.replace' in file "src/index.ml", line 989, characters 30-50
  Called from Index.Make_private.replace in file "src/index.ml" (inlined), line 1013, characters 12-55
  Called from Irmin_pack_unix__Pack_index.Make.add in file "src/irmin-pack/unix/pack_index.ml", line 62, characters 30-55
  Called from Irmin_pack_unix__Pack_store.Maker.Make_without_close_checks.unsafe_append.unguarded_append in file "src/irmin-pack/unix/pack_store.ml", line 473, characters 12-68
  Called from Irmin_pack_unix__Pack_store.Maker.Make_without_close_checks.unsafe_add in file "src/irmin-pack/unix/pack_store.ml" (inlined), line 489, characters 6-66
  Called from Irmin_pack_unix__Pack_store.Maker.Make_without_close_checks.add in file "src/irmin-pack/unix/pack_store.ml", line 491, characters 18-45
  Called from Irmin__Store.Make.Commit.v.(fun) in file "src/irmin/store.ml", line 178, characters 17-40
  Called from Irmin_pack_unix__Pack_store.Maker.Make_without_close_checks.batch in file "src/irmin-pack/unix/pack_store.ml", line 431, characters 15-25
  Called from Irmin_pack_unix__Pack_store.Maker.Make_without_close_checks.batch in file "src/irmin-pack/unix/pack_store.ml", line 431, characters 15-25
  Called from Irmin_pack_unix__Pack_store.Maker.Make_without_close_checks.batch in file "src/irmin-pack/unix/pack_store.ml", line 431, characters 15-25
  Called from Tezos_context__Context.Make.raw_commit in file "src/lib_context/context.ml", line 325, characters 13-74
  Called from Tezos_context__Context.Make.commit_genesis in file "src/lib_context/context.ml", line 692, characters 19-59
  Called from Tezos_store__Store.init in file "src/lib_store/store.ml", line 2655, characters 27-51
  Called from Yes_wallet_lib.load_mainnet_bakers_public_keys in file "scripts/yes-wallet/yes_wallet_lib.ml", line 462, characters 4-206
  Called from Yes_wallet_lib.load_mainnet_bakers_public_keys in file "scripts/yes-wallet/yes_wallet_lib.ml", line 520, characters 6-112
  Called from Dune__exe__Yes_wallet in file "scripts/yes-wallet/yes_wallet.ml", line 221, characters 8-130

  I have got the same error on master. Am I doing wrong ? Does yes-wallet is broken ?