runmodes: clear hint when runmode is not indicated #6

Job	Run time
Prepare cbindgen	41s
Prepare dependencies	56s
AlmaLinux 9 Test Templates	7m 54s
AlmaLinux 8	13m 33s
AlmaLinux 9	23m 16s
AlmaLinux 9 (no jansson)	1m 54s
Fedora 37 (clang, debug, asan, wshadow, rust-strict, systemd)	9m 7s
Fedora 38 (clang, debug, asan, wshadow, rust-strict, systemd)	1h 15m 20s
Fedora 37 (non-root, debug, clang, asan, wshadow, rust-strict, systemd)	10m 14s
Fedora 37 (gcc, debug, asan, wshadow, rust-strict)	12m 53s
Fedora 38 (gcc, debug, asan, wshadow, rust-strict)	13m 52s
Fedora 38 (Suricata Verify codecov)	20m 2s
Debian 10	10m 44s
Debian 11 (xdp)	12m 27s
Debian 12	15m 44s
Debian 12 MSRV	35m 19s
MacOS Latest	18m 15s
Debian 12 Dist Builder	9m 29s
Ubuntu 20.04 (-DNDEBUG)	13m 13s
Ubuntu 22.04 (fuzz corpus coverage)	16m 0s
Ubuntu 22.04 (unittests coverage)	10m 1s
Ubuntu 22.04 (Debug Validation)	19m 15s
Ubuntu 22.04 (DPDK Build) (22.11.3)	17m 30s
Ubuntu 22.04 (Fuzz)	15m 18s
Ubuntu 22.04 (DPDK Build) (21.11.5)	21m 28s
Ubuntu 22.04 (Netmap build)	3m 26s
Ubuntu 22.04 (DPDK Build) (20.11.9)	28m 25s
Windows MSYS2 MINGW64 (NPcap)	40m 31s
Ubuntu 22.04 (DPDK Build) (19.11.14)	18m 8s
Windows MSYS2 MINGW64 (libpcap)	33m 14s
Windows MSYS2 MINGW64 (WinDivert)	25m 20s
CentOS Stream 8	10m 3s
CentOS Stream 9	6m 14s
Ubuntu 20.04 (unsupported rust)	1m 16s
CentOS 7	14m 19s
	9h 45m 21s

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