inconsistent gentx --pubkey CLI input in 0.43.0-rc2

[tomtau]

Summary of Bug

Currently, gentx expects the validator public in the following format:

{"key":"<base64 payload>"}

On the other hand tx staking create-validator expects in the following format:

{"@type":"/cosmos.crypto.ed25519.PubKey","key":"<base64 payload>"}

In addition to that, the CLI help prompts are incorrect:

      --pubkey string                       The Bech32 encoded PubKey of the validator

Version

0.43.0-rc2

Steps to Reproduce

Build an app with against SDK v0.43.0-rc2 (e.g. simapp) and run gentx or tx staking create-validator.

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[alexanderbez]

Thanks for pointing this out @tomtau 🙏