merge: use repo_in_merge_bases for octopus up-to-date check #27729

Job	Run time
config	7s
fuzz smoke test	1m 20s
static-analysis	6m 22s
win build	4m 56s
osx-clang (macos-14)	18m 16s
osx-gcc (macos-14)	18m 59s
sparse	3m 23s
osx-reftable (macos-14)	22m 10s
win+VS build	0s
osx-meson (macos-14)	23m 15s
win+Meson build	4m 4s
documentation	7m 16s
rust-analysis	1m 33s
linux32 (i386/ubuntu:focal)	10m 10s
linux-TEST-vars (ubuntu:20.04)	12m 59s
linux-leaks (ubuntu:rolling)	29m 32s
linux-sha256 (ubuntu:rolling)	1m 14s
linux-meson (ubuntu:rolling)	13m 44s
linux-asan-ubsan (ubuntu:rolling)	1m 24s
almalinux-8 (almalinux:8)	10m 37s
debian-11 (debian:11)	10m 34s
linux-musl-meson (alpine:latest)	7m 50s
fedora-breaking-changes-meson (fedora:latest)	10m 35s
linux-breaking-changes (ubuntu:rolling)	12m 56s
linux-reftable (ubuntu:rolling)	1m 28s
linux-reftable-leaks (ubuntu:rolling)	30m 47s
win+VS test	0s
win+Meson test (1)	10m 48s
win+Meson test (0)	9m 9s
win+Meson test (3)	5m 35s
win+Meson test (2)	10m 30s
win+Meson test (4)	7m 8s
win+Meson test (6)	11m 55s
win+Meson test (8)	7m 42s
win+Meson test (5)	9m 6s
win+Meson test (7)	7m 44s
win+Meson test (9)	6m 48s
win test (3)	9m 26s
win test (7)	7m 41s
win test (1)	10m 22s
win test (0)	8m 18s
win test (2)	6m 6s
win test (9)	7m 55s
win test (6)	5m 42s
win test (5)	9m 47s
win test (4)	6m 58s
win test (8)	4m 54s
	7h 9m 5s

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