mingw: use strftime() directly in UCRT builds (#6130) #6489

Job	Run time
config	10s
fuzz smoke test	1m 26s
win+Meson build	4m 9s
static-analysis	5m 52s
rust-analysis	1m 39s
win build	4m 58s
documentation	7m 2s
sparse	3m 31s
win+VS build (x64)	3m 8s
win+VS build (arm64)	1m 57s
osx-meson (macos-14)	20m 6s
linux-reftable (ubuntu:rolling)	13m 23s
osx-reftable (macos-14)	17m 4s
osx-gcc (macos-14)	17m 57s
linux-asan-ubsan (ubuntu:rolling)	33m 38s
linux32 (i386/ubuntu:focal)	10m 33s
linux-meson (ubuntu:rolling)	13m 26s
linux-sha256 (ubuntu:rolling)	13m 7s
linux-breaking-changes (ubuntu:rolling)	10m 37s
almalinux-8 (almalinux:8)	10m 39s
osx-clang (macos-14)	20m 42s
fedora-breaking-changes-meson (fedora:latest)	9m 50s
linux-musl-meson (alpine:latest)	7m 57s
linux-reftable-leaks (ubuntu:rolling)	28m 16s
debian-11 (debian:11)	10m 35s
linux-leaks (ubuntu:rolling)	27m 5s
linux-TEST-vars (ubuntu:20.04)	13m 3s
win+Meson test (6)	11m 49s
win+Meson test (0)	7m 29s
win+Meson test (7)	7m 42s
win+Meson test (3)	8m 37s
win+Meson test (5)	10m 10s
win+Meson test (4)	8m 33s
win+Meson test (8)	11m 38s
win+Meson test (1)	7m 15s
win+Meson test (2)	9m 59s
win+Meson test (9)	7m 11s
win+VS test	-1s
win test (5)	10m 34s
win test (4)	7m 55s
win test (7)	7m 5s
win test (6)	6m 9s
win test (9)	11m 21s
win test (2)	10m 8s
win test (3)	8m 3s
win test (0)	6m 4s
win test (1)	5m 31s
win test (8)	7m 40s
	8h 2m 42s

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