Update to tendermint 0.23.4 and harmonize the dependencies to use a single TLS stack (informalsystems#1762)

* Remove the extra patch section in Cargo.toml

* Update tendermint-rs to 0.23.4

* guide: Remove OpenSSL pre-requisite

The build no longer requires this.

* Add changelog entry

* Update changelog entry

Co-authored-by: Romain Ruetschi <[email protected]>

Author: mzabaluev

.changelog/unreleased/improvements/1641-tendermint-0.23.4.md

@@ -0,0 +1,2 @@
+- Update `tendermint-rs` to v0.23.4 and harmonize the dependencies to use a single TLS stack
+  ([#1641](https://github.com/informalsystems/ibc-rs/issues/1641))