use keyed jagged index select for lengths permute #5995

Job	Run time
build_test (linux.2xlarge, 3.10, py310) / linux-job	8m 14s
build_test (linux.2xlarge, 3.11, py311) / linux-job	8m 29s
build_test (linux.2xlarge, 3.8, py38) / linux-job	7m 58s
build_test (linux.2xlarge, 3.9, py39) / linux-job	8m 23s
	33m 4s

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