feat: add abstention support to BinaryClassificationController #4533

Job	Run time
build (windows-latest, 3.x, false)	22m 0s
build (self-hosted-ubuntu, 3.9, true, ==1.24.1, ==1.4., ==1.10.)	32m 0s
build (macos-latest, 3.x, false)	16m 5s
build (ubuntu-latest, 3.x, false)	19m 37s
	1h 29m 42s

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