Update relevant docs to remove usage of bech32 pubkeys, and document new Any usage

[robert-zaremba]

Summary

We don't have a clear documentation how to serialize data with regards to pub keys

• Docs: Anys Usage, Events & small cleanups #8895 docs/core/encoding.md
• ADR-019/020 cleanups: HybridCodec, Pubkey #8683 adr-019-protobuf-state-encoding.md
• https://docs.cosmos.network/master/basics/accounts.html (remove all bech32 pubkey mentions)
  • maybe worth to do a CTRL+F of bech32 and make sure all instances are only about addresses

Ref: #7447

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[amaury1093]

@robert-zaremba The item "adr-019-protobuf-state-encoding.md" is done already, correct? I see correct mentions of MarshalInterface for marshaling interface with any. Was there something else you wanted to add?

[amaury1093]

When reading ADR-019, it did mention HybridCodec, which was removed, so i created #8683.

[robert-zaremba]

@robert-zaremba The item "adr-019-protobuf-state-encoding.md" is done already, correct? I see correct mentions of MarshalInterface for marshaling interface with any. Was there something else you wanted to add?

Yes, we updated it for MarshalInterface, but here we should mostly check if we need to update mentions related to bech32

[amaury1093]

Understood. I believe the pubkey encoding bech32->any only happened in the Validator. I went through adr 019 and 020, there's no mention (and imo, no need to mention) of bech32 in those 2 ADRs.

I updated adr 020 to mention our new PubKey types in #8683

[amaury1093]

I closed too prematurely. There are some mentions of bech32 pubkeys in https://docs.cosmos.network/master/basics/accounts.html. i can take care of that once #7477 is merged

See 1st post for details