chore: miscellaneous RNTuple improvements #4111

Job	Run time
pyodide-build	2m 5s
build (windows-latest, 3.8)	7m 58s
numpy1-build (windows-latest, 3.11)	3m 41s
build (windows-latest, 3.9)	6m 50s
vanilla-build (windows-latest, 3.11)	5m 24s
numpy1-build (ubuntu-latest, 3.11)	2m 46s
build (windows-latest, 3.10)	7m 47s
vanilla-build (ubuntu-latest, 3.11)	3m 28s
numpy1-build (macos-latest, 3.11)	1m 46s
build (windows-latest, 3.11)	8m 38s
vanilla-build (macos-latest, 3.11)	2m 45s
build (windows-latest, 3.12)	7m 46s
build (macos-latest, 3.8)	4m 17s
build (macos-latest, 3.9)	4m 21s
build (macos-latest, 3.10)	3m 52s
build (macos-latest, 3.11)	3m 50s
build (macos-latest, 3.12)	4m 6s
build (ubuntu-latest, 3.8)	5m 24s
build (ubuntu-latest, 3.9)	5m 7s
build (ubuntu-latest, 3.10)	5m 20s
build (ubuntu-latest, 3.11)	4m 8s
build (ubuntu-latest, 3.12)	4m 9s
pass	3s
	1h 45m 31s

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