safe.bareRepository: default to "explicit" with WITH_BREAKING_CHANGES #27205

Job	Run time
config	6s
fuzz smoke test	1m 6s
win+VS build	-1s
win+Meson build	4m 52s
static-analysis	7m 13s
sparse	3m 26s
win build	5m 13s
documentation	7m 30s
osx-clang (macos-14)	20m 8s
rust-analysis	1m 31s
osx-reftable (macos-14)	18m 45s
linux-sha256 (ubuntu:rolling)	13m 18s
linux-TEST-vars (ubuntu:20.04)	12m 47s
fedora-breaking-changes-meson (fedora:latest)	9m 38s
linux32 (i386/ubuntu:focal)	10m 36s
linux-reftable-leaks (ubuntu:rolling)	30m 19s
linux-musl-meson (alpine:latest)	7m 52s
debian-11 (debian:11)	10m 4s
osx-gcc (macos-14)	20m 50s
osx-meson (macos-14)	25m 29s
linux-asan-ubsan (ubuntu:rolling)	34m 18s
linux-reftable (ubuntu:rolling)	13m 39s
almalinux-8 (almalinux:8)	10m 41s
linux-leaks (ubuntu:rolling)	26m 46s
win+VS test	0s
linux-meson (ubuntu:rolling)	13m 17s
linux-breaking-changes (ubuntu:rolling)	12m 51s
win+Meson test (9)	7m 48s
win+Meson test (8)	8m 33s
win+Meson test (3)	6m 22s
win+Meson test (6)	12m 45s
win+Meson test (4)	7m 22s
win+Meson test (1)	9m 55s
win+Meson test (7)	7m 10s
win+Meson test (5)	10m 36s
win+Meson test (2)	9m 55s
win+Meson test (0)	9m 29s
win test (1)	9m 53s
win test (3)	9m 20s
win test (5)	8m 45s
win test (7)	5m 48s
win test (9)	10m 3s
win test (2)	7m 10s
win test (8)	7m 28s
win test (0)	6m 15s
win test (4)	10m 24s
win test (6)	6m 26s
	8h 13m 41s

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