Remove rust_object_field usage from Throwable, Class, ZipFile, InputStreamReader #676

Job	Run time
rust_ci (ubuntu-latest, stable)	1m 15s
rust_ci (ubuntu-latest, beta)	1m 25s
rust_ci (windows-latest, beta)	2m 43s
rust_ci (macos-latest, beta)	1m 20s
rust_ci (macos-latest, stable)	1m 6s
rust_ci (windows-latest, stable)	2m 57s
	10m 46s

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