Refactor/rework release process

[jleni]

This issue is related to cosmos/gaia#1801

• align with any changes done in cosmos/ledger-go, move them to zondax/ledger-go
• deprecate cosmos/ledger-go
• release a new version of zondax/ledger-go
• update ledger-cosmos-go to point to zondax/ledger-go
• release ledger-cosmos-go
• rework fork relations so cosmos/ledger-cosmos-go is the main repo

[ftheirs]

All the task related to development were done! I created this task to track the fork relations since it's more related to github repo configuration more than adding some new feature: #38