Switch `AlonzoTxAuxData` to use `NativeScript` #19722

Job	Run time
shellcheck	7s
gen-hie	47s
Check that there are no additions of `undefined`s in the PR diff	12s
cabal-format	7s
fourmolu	40s
Check branch history	11s
build (9.8.4, ubuntu-latest)	48s
build (9.6.7, ubuntu-latest)	47s
build (9.12.2, ubuntu-latest)	49s
build (9.10.2, ubuntu-latest)	49s
Check if formal-ledger-specifications SRP is valid	27s
${{ matrix.package }}-${{ matrix.ghc }}-${{ matrix.os }}	1s
Tests completed	2s
codegen	1s
Send a slack notification on \#ledger-internal if the nightly build failed	1s
	5m 49s

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