Switch `AlonzoTxAuxData` to use `NativeScript` #19724

Job	Run time
build (9.8.4, ubuntu-latest)	15m 39s
fourmolu	38s
build (9.6.7, ubuntu-latest)	23m 27s
build (9.12.2, ubuntu-latest)	21m 36s
Check if formal-ledger-specifications SRP is valid	27s
build (9.10.2, ubuntu-latest)	14m 26s
Check that there are no additions of `undefined`s in the PR diff	12s
shellcheck	6s
gen-hie	7m 18s
cabal-format	5s
Check branch history	12s
${{ matrix.package }}-${{ matrix.ghc }}-${{ matrix.os }}	0s
Tests completed	3s
Send a slack notification on \#ledger-internal if the nightly build failed	-1s
codegen	-1s
	1h 24m 7s

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