t: add greplint.pl and convert grep to test_grep #28368

Job	Run time
config	7s
fuzz smoke test	1m 29s
rust-analysis	1m 29s
sparse	3m 46s
static-analysis	6m 13s
win build	4m 52s
win+Meson build	3m 29s
documentation	7m 21s
osx-reftable (macos-14)	35m 26s
osx-clang (macos-14)	6h 0m 17s
osx-meson (macos-14)	6h 0m 19s
osx-gcc (macos-14)	5h 38m 13s
linux-sha256 (ubuntu:rolling)	25m 7s
linux-reftable (ubuntu:rolling)	24m 19s
linux-asan-ubsan (ubuntu:rolling)	1h 10m 59s
linux-leaks (ubuntu:rolling)	48m 27s
linux-reftable-leaks (ubuntu:rolling)	48m 0s
linux-musl-meson (alpine:latest)	23m 32s
fedora-breaking-changes-meson (fedora:latest)	17m 13s
linux-breaking-changes (ubuntu:rolling)	24m 44s
linux-meson (ubuntu:rolling)	23m 13s
linux-TEST-vars (ubuntu:20.04)	27m 44s
almalinux-8 (almalinux:8)	18m 20s
debian-11 (debian:11)	22m 32s
win+VS build	0s
linux32 (i386/ubuntu:focal)	6h 0m 3s
win+VS test	-1s
win+Meson test (5)	8m 33s
win+Meson test (1)	7m 45s
win+Meson test (3)	8m 58s
win+Meson test (7)	9m 10s
win+Meson test (9)	4m 12s
win+Meson test (0)	8m 12s
win+Meson test (6)	14m 26s
win+Meson test (8)	10m 10s
win+Meson test (2)	1h 0m 44s
win+Meson test (4)	10m 9s
win test (7)	11m 22s
win test (9)	6m 54s
win test (1)	5m 19s
win test (5)	9m 23s
win test (3)	59m 54s
win test (6)	10m 39s
win test (8)	6m 33s
win test (4)	6m 49s
win test (0)	12m 44s
win test (2)	7m 7s
	1d 11h 36m 16s

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