Cardano Updates

Introduced `cardano-diffusion` package.

Some things are hidden inside of it because that's how we are testing
things now, in particular `PeerSelection` and `Testnet` tests depend on
`Cardano` constructs.  In the future we could split them into general
test & cardano specific tests, this will be in particularly useful for
another non-trivial extension of `ouroboros-network`, but also might
organise tests better.

co-authored-by:"[email protected]"

* `ouroboros-network-api`                         -> `ouroboros-network:api`       in `ouroboros-network/api/lib`
* `ouroboros-network-api:test`                    -> `ouroboros-network:api-tests` in `ouroboros-network/api/tests`
* `ouroboros-network-api:bench-anchored-fragment` -> `ouroboros-network:api-bench` in `ouroboros-network/api/bench`

* `ouroboros-network-testing`      -> `ouroboros-network:tests-lib` in `tests-lib/lib`
* `ouroboros-network-testing:test` -> `ouroboros-network:tests-lib` in `tests-lib/tests`

ouroboros-network tests moved / renamed:
* `ouroboros-network:testlib`   -> `ouroboros-network:ouroboros-network-tests-lib` in `tests/lib`
* `ouroboros-network:sim-tests` -> `ouroboros-network:ouroboros-network-sim-tests` in `tests/sim`
* `ouroboros-network:io-tests`  -> `ouroboros-network:ouroboros-network-io-tests`  in `tests/io`

* `ouroboros-newtork-mock` -> `ouroboros-network:mock` in `mock`

* `ouroboros-network-framework`                         -> `ouroboros-network:framework`           in `framework/lib`
* `ouroboros-network-framework:testlib`                 -> `ouroboros-network:framework-tests-lib` in `framework/tests-lib`
* `ouroboros-network-framework:sim-tests`               -> `ouroboros-network:framework-sim-tests` in `framework/sim-tests`
* `ouroboros-network-framework:io-tests`                -> `ouroboros-network:framework-io-tests`  in `framework/io-tests`
* `ouroboros-network-framework:demo-connection-manager` -> `ouroboros-network:demo-connection-manager` in `demo`
* `ouroboros-network-framework:demo-ping-pong`          -> `ouroboros-network:demo-ping-pong`          in `demo`

* `ouroboros-network-protocols`         -> `ouroboros-network:protocols` in `protocols/lib`
* `ouroboros-network-protocols:testlib` -> `ouroboros-network:protocols-tests-lib` in `protocols/tests-lib`
* `ouroboros-network-protocols:test`    -> `ouroboros-network:protocols-tests` in `protocols/tests`
* `ouroboros-network-protocols:bench`   -> `ouroboros-network:protocols-bench` in `protocols/bench`