Add cbor `RoundTrip` tests for blocks for each era #17111

Job	Run time
fourmolu	47s
gen-hie	2m 42s
build (8.10.7, ubuntu-latest)	2m 40s
Check branch history	12s
build (9.2.8, ubuntu-latest)	2m 36s
cabal-format	5s
build (9.6.6, ubuntu-latest)	2m 40s
Check if formal-ledger-specifications SRP is valid	14s
build (9.8.4, ubuntu-latest)	2m 40s
build (9.10.1, ubuntu-latest)	2m 41s
${{ matrix.package }}-${{ matrix.ghc }}-${{ matrix.os }}	1s
Send a slack notification on \#ledger-internal if the nightly build failed	1s
Tests completed	1s
	17m 20s

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