[RFC PATCH] dir: add discoverable local-only .gitlocalignore #29025

Job	Run time
config	13s
fuzz smoke test	1m 20s
win build	4m 59s
win+Meson build	1m 21s
sparse	3m 24s
documentation	5m 25s
osx-clang (macos-14)	48s
osx-reftable (macos-14)	1m 8s
osx-gcc (macos-14)	1m 30s
osx-meson (macos-14)	21s
rust-analysis	1m 47s
static-analysis	6m 38s
linux-meson (ubuntu:rolling)	1m 15s
linux-musl-meson (alpine:latest)	20s
win+VS build	0s
linux-sha256 (ubuntu:rolling)	2m 56s
fedora-breaking-changes-meson (fedora:latest)	1m 1s
linux32 (i386/ubuntu:20.04)	2m 36s
debian-11 (debian:11)	2m 12s
linux-breaking-changes (ubuntu:rolling)	2m 46s
almalinux-8 (almalinux:8)	2m 40s
linux-asan-ubsan (ubuntu:rolling)	3m 44s
linux-leaks (ubuntu:rolling)	1m 51s
linux-reftable (ubuntu:rolling)	2m 36s
linux-reftable-leaks (ubuntu:rolling)	1m 48s
linux-TEST-vars (ubuntu:20.04)	2m 55s
win+VS test	0s
win+Meson test	0s
win test (2)	7m 19s
win test (7)	21m 9s
win test (0)	13m 26s
win test (6)	8m 46s
win test (4)	9m 25s
win test (8)	8m 2s
win test (1)	8m 20s
win test (3)	9m 44s
win test (5)	9m 50s
win test (9)	5m 27s
	2h 39m 2s

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