t0213: skip ancestry tests under user-mode emulation #28835

Job	Run time
config	9s
fuzz smoke test	1m 10s
documentation	5m 33s
sparse	3m 53s
win+Meson build	3m 55s
win build	5m 8s
rust-analysis	1m 27s
static-analysis	5m 33s
osx-clang (macos-14)	5m 42s
osx-reftable (macos-14)	5m 42s
osx-gcc (macos-14)	5m 40s
osx-meson (macos-14)	5m 35s
almalinux-8 (almalinux:8)	5m 20s
linux-TEST-vars (ubuntu:20.04)	5m 22s
linux-reftable (ubuntu:rolling)	5m 21s
fedora-breaking-changes-meson (fedora:latest)	5m 20s
linux-leaks (ubuntu:rolling)	5m 21s
linux-asan-ubsan (ubuntu:rolling)	5m 22s
win+VS build	0s
linux32 (i386/ubuntu:20.04)	5m 21s
linux-musl-meson (alpine:latest)	4m 9s
linux-reftable-leaks (ubuntu:rolling)	4m 53s
linux-sha256 (ubuntu:rolling)	4m 46s
linux-breaking-changes (ubuntu:rolling)	1m 26s
linux-meson (ubuntu:rolling)	1m 24s
debian-11 (debian:11)	3m 51s
win+VS test	0s
win+Meson test (3)	7m 23s
win+Meson test (1)	6m 59s
win+Meson test (8)	10m 12s
win+Meson test (4)	14m 58s
win+Meson test (0)	8m 18s
win+Meson test (9)	6m 29s
win+Meson test (2)	14m 57s
win+Meson test (6)	12m 7s
win+Meson test (7)	8m 27s
win+Meson test (5)	9m 12s
win test (0)	11m 31s
win test (4)	14m 5s
win test (1)	9m 46s
win test (5)	7m 44s
win test (2)	6m 38s
win test (9)	5m 58s
win test (8)	6m 55s
win test (6)	6m 8s
win test (3)	8m 24s
win test (7)	6m 25s
	4h 49m 59s

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