avoid progress-related hot spot in `ValueFlowPassRunner::run()` #19184

Job	Run time
build_cmake (alpine:3.23, false, false)	4m 30s
build_make (ubuntu:25.10)	3m 38s
build_make (ubuntu:24.04)	3m 6s
build_cmake (ubuntu:25.10, true, true)	3m 11s
build_cmake (ubuntu:24.04, true, true)	3m 36s
build_make (alpine:3.23)	6m 6s
	24m 7s

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