Switch `AlonzoTxAuxData` to use `NativeScript` #19709

Job	Run time
cabal-format	5s
build (9.10.2, ubuntu-latest)	1m 14s
build (9.8.4, ubuntu-latest)	1m 11s
build (9.6.7, ubuntu-latest)	1m 10s
fourmolu	41s
build (9.12.2, ubuntu-latest)	1m 15s
gen-hie	1m 13s
shellcheck	9s
Check branch history	12s
Check that there are no additions of `undefined`s in the PR diff	13s
Check if formal-ledger-specifications SRP is valid	30s
${{ matrix.package }}-${{ matrix.ghc }}-${{ matrix.os }}	1s
Tests completed	3s
codegen	1s
Send a slack notification on \#ledger-internal if the nightly build failed	1s
	7m 59s

Provide feedback