More replacement of `Collections.singletonList`, `emptyList`, and `em… #5551

Job	Run time
build-windows-macos (windows-latest, 21, -x doctest -PbuildPlatform=windows)	22m 52s
build-windows-macos (macos-13, 21)	42m 17s
Get-CI-Image-Tag / Get-CI-Image-Tag	4s
bwc-tests (21)	6m 57s
build-linux (21)	31m 38s
	1h 43m 48s

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