NDArrayPrinter::FloatTruncate: rename + refactor #1360

Job	Run time
macos-latest: clang++ Release Pthreads	14m 6s
macos-latest: clang++ Release PaRSEC	11m 45s
macos-latest: clang++ Debug Pthreads	15m 24s
macos-latest: clang++ Debug PaRSEC	14m 32s
ubuntu-24.04: /usr/bin/g++-14 Release Pthreads	24m 50s
ubuntu-24.04: /usr/bin/g++-14 Release PaRSEC	25m 59s
ubuntu-24.04: /usr/bin/g++-14 Debug Pthreads	22m 13s
ubuntu-24.04: /usr/bin/g++-14 Debug PaRSEC	21m 41s
	2h 30m 30s

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