tendermint: update to rc3 (#6892)

* modify light imports

* change abci.header to tmproto.header

* use rc

* rc

* fix import

* Merge PR #6893: fix key imports

* fix rc2

* tendermint: update 3 (#6899)

* tendermint: update 4 (#6919)

Co-authored-by: Alexander Bezobchuk <alexanderbez@users.noreply.github.com>

* tendermint: update 5 (#6923)

Co-authored-by: Federico Kunze <31522760+fedekunze@users.noreply.github.com>

* bump to latest master

* tendermint: update (#6972)

Co-authored-by: Aleksandr Bezobchuk <aleks.bezobchuk@gmail.com>
Co-authored-by: Cory Levinson <cjlevinson@gmail.com>

* Update x/ibc/07-tendermint/types/test_utils.go

Co-authored-by: Federico Kunze <31522760+fedekunze@users.noreply.github.com>

* address comment

* go mod

* bring back things

* fix test

* update tm proto files

Co-authored-by: Alexander Bezobchuk <alexanderbez@users.noreply.github.com>
Co-authored-by: Federico Kunze <31522760+fedekunze@users.noreply.github.com>
Co-authored-by: Aleksandr Bezobchuk <aleks.bezobchuk@gmail.com>
Co-authored-by: Cory Levinson <cjlevinson@gmail.com>
Co-authored-by: Federico Kunze <federico.kunze94@gmail.com>

docs/core/context.md

@@ -19,7 +19,7 @@ The SDK `Context` is a custom data structure that contains Go's stdlib [`context
 type Context struct {
   ctx           context.Context
   ms            MultiStore
-  header        abci.Header
+  header        tmproto.Header
   chainID       string
   txBytes       []byte
   logger        log.Logger