t: add greplint.pl and convert grep to test_grep #28423

Job	Run time
config	7s
fuzz smoke test	1m 59s
win build	4m 51s
static-analysis	6m 13s
win+Meson build	3m 57s
rust-analysis	1m 28s
sparse	3m 39s
documentation	7m 42s
osx-clang (macos-14)	2h 28m 28s
fedora-breaking-changes-meson (fedora:latest)	17m 58s
linux-meson (ubuntu:rolling)	25m 39s
linux-reftable-leaks (ubuntu:rolling)	23m 56s
osx-reftable (macos-14)	2h 28m 29s
linux-leaks (ubuntu:rolling)	27m 36s
osx-meson (macos-14)	2h 28m 28s
linux-musl-meson (alpine:latest)	21m 26s
osx-gcc (macos-14)	2h 27m 17s
almalinux-8 (almalinux:8)	20m 15s
linux-asan-ubsan (ubuntu:rolling)	29m 49s
linux-breaking-changes (ubuntu:rolling)	28m 50s
linux32 (i386/ubuntu:focal)	7m 23s
linux-sha256 (ubuntu:rolling)	7m 28s
linux-reftable (ubuntu:rolling)	15m 42s
debian-11 (debian:11)	21m 56s
linux-TEST-vars (ubuntu:20.04)	18m 18s
win+VS build	-1s
win+VS test	0s
win+Meson test (7)	8m 59s
win+Meson test (0)	7m 46s
win+Meson test (4)	8m 35s
win+Meson test (5)	9m 24s
win+Meson test (1)	6m 38s
win+Meson test (9)	6m 27s
win+Meson test (3)	11m 9s
win+Meson test (2)	27m 36s
win+Meson test (6)	9m 31s
win+Meson test (8)	9m 18s
win test (0)	26s
win test (2)	23s
win test (5)	25s
win test (6)	24s
win test (1)	22s
win test (9)	23s
win test (3)	27s
win test (4)	14s
win test (7)	23s
win test (8)	31s
	16h 38m 14s

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