revision: honor --exclude-first-parent-only with SEEN first parent #29226

Job	Run time
config	8s
fuzz smoke test	1m 12s
win build	2m 7s
static-analysis	5m 31s
win+Meson build	4m 15s
sparse	3m 17s
documentation	7m 14s
osx-clang (macos-14)	20m 21s
rust-analysis	1m 51s
osx-reftable (macos-14)	23m 17s
osx-gcc (macos-14)	17m 2s
osx-meson (macos-14)	19m 43s
linux-reftable-leaks (ubuntu:rolling)	43m 34s
win+VS build	-1s
linux-musl-meson (alpine:latest)	7m 59s
linux-TEST-vars (ubuntu:20.04)	13m 20s
debian-11 (debian:11)	10m 44s
linux-sha256 (ubuntu:rolling)	1m 30s
linux-meson (ubuntu:rolling)	13m 55s
almalinux-8 (almalinux:8)	8m 44s
linux-reftable (ubuntu:rolling)	1m 51s
linux32 (i386/ubuntu:focal)	10m 39s
linux-breaking-changes (ubuntu:rolling)	13m 20s
fedora-breaking-changes-meson (fedora:latest)	8m 55s
linux-asan-ubsan (ubuntu:rolling)	1m 29s
linux-leaks (ubuntu:rolling)	40m 54s
win+VS test	0s
win test	-1s
win+Meson test (2)	8m 0s
win+Meson test (5)	9m 7s
win+Meson test (7)	6m 58s
win+Meson test (3)	6m 5s
win+Meson test (0)	9m 26s
win+Meson test (9)	7m 59s
win+Meson test (4)	6m 46s
win+Meson test (1)	10m 49s
win+Meson test (8)	8m 51s
win+Meson test (6)	9m 11s
	6h 6m 2s

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