Adapt moved tests to hspec
and remove other depdencies on cardano-ledger-alonzo-test
and remove other depdencies on cardano-ledger-alonzo-test
from `cardano-ledger-conway-test`
since it's only exporting Alonzo `Generators`
in the respective testlib library, and expose them as `Test.Cardano.Ledger.<era>.Examples.ledgerExamples`
to separate protocol-dependent examples from the ones that can be fully defined in ledger for each era
It is not required by the `STS (ShelleyPOOL)` instance
It should not constrain `ShelleyEraImp` for the same reason it does not constrain `ShelleyEraTest`. See #4992