cosmos#11129

…#11224)

* fix: Add RegisterLegacyAminoCodec for authz/feegrant

* add module name

* Fix GetSignByes, add tests

* removed module names from registered messages to match other modules

* added interfaces and concrete types registration

* unseal amino instances to allow external grant and authorization registration

* fixed messages tests

* allow to register external types into authz modulecdc

* use legacy.Cdc instead of ModuleCdc inside x/authz

* move the legacy.Cdc initialization outside init function

* added serialization docs

* Update docs/core/encoding.md

Co-authored-by: Amaury <1293565+amaurym@users.noreply.github.com>

* added the Ledger specification

* fixed tests

Co-authored-by: Amaury M <1293565+amaurym@users.noreply.github.com>

Reverts the usage of a singleton `legacy.Cdc` codec while (de)serializing `x/authz` messages.

Closes: cosmos#11643

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I have...

- [ ] included the correct [type prefix](https://github.com/commitizen/conventional-commit-types/blob/v3.0.0/index.json) in the PR title
- [ ] added `!` to the type prefix if API or client breaking change
- [ ] targeted the correct branch (see [PR Targeting](https://github.com/cosmos/cosmos-sdk/blob/master/CONTRIBUTING.md#pr-targeting))
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- [ ] followed the guidelines for [building modules](https://github.com/cosmos/cosmos-sdk/blob/master/docs/building-modules)
- [ ] included the necessary unit and integration [tests](https://github.com/cosmos/cosmos-sdk/blob/master/CONTRIBUTING.md#testing)
- [ ] added a changelog entry to `CHANGELOG.md`
- [ ] included comments for [documenting Go code](https://blog.golang.org/godoc)
- [ ] updated the relevant documentation or specification
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- [ ] confirmed the correct [type prefix](https://github.com/commitizen/conventional-commit-types/blob/v3.0.0/index.json) in the PR title
- [ ] confirmed `!` in the type prefix if API or client breaking change
- [ ] confirmed all author checklist items have been addressed
- [ ] reviewed state machine logic
- [ ] reviewed API design and naming
- [ ] reviewed documentation is accurate
- [ ] reviewed tests and test coverage
- [ ] manually tested (if applicable)