Fix #14762 FN knownConditionTrueFalse (default constructed container)… #19883

Job	Run time
build_cmake (ubuntu:24.04, true, true)	2m 37s
build_cmake (ubuntu:25.10, true, true)	5m 21s
build_make (alpine:3.23)	5m 9s
build_make (ubuntu:24.04)	3m 3s
build_cmake (alpine:3.23, false, false)	4m 18s
build_make (ubuntu:25.10)	3m 17s
	23m 45s

Provide feedback