Switch `AlonzoTxAuxData` to use `NativeScript` #19719

Job	Run time
build (9.10.2, ubuntu-latest)	9m 27s
Check branch history	12s
build (9.12.2, ubuntu-latest)	10m 8s
build (9.8.4, ubuntu-latest)	10m 22s
fourmolu	40s
build (9.6.7, ubuntu-latest)	10m 18s
shellcheck	7s
Check if formal-ledger-specifications SRP is valid	37s
cabal-format	5s
gen-hie	7m 4s
Check that there are no additions of `undefined`s in the PR diff	12s
${{ matrix.package }}-${{ matrix.ghc }}-${{ matrix.os }}	1s
codegen	1s
Tests completed	3s
Send a slack notification on \#ledger-internal if the nightly build failed	1s
	49m 18s

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