SSH cert sign: check OpenSSL return code #2481

Job	Run time
build on fedora:40 (gcc, true)	1m 47s
build on fedora:40 (clang, false)	1m 41s
build on fedora:41 (gcc, false)	1m 38s
build on fedora:41 (clang, false)	1m 23s
build on ubuntu:24.10 (gcc,false)	1m 23s
build on ubuntu:24.10 (clang,false)	1m 28s
build on ubuntu:24.04 (gcc,false)	1m 17s
build on ubuntu:24.04 (clang,false)	1m 26s
build on ubuntu:22.04 (gcc,false)	1m 16s
build on ubuntu:22.04 (clang,true)	1m 30s
build on macos (macos-latest)	53s
build on ubuntu:20.04 (gcc,false)	1m 25s
build on ubuntu:20.04 (clang,false)	1m 40s
build on debian:12 (gcc,false)	1m 28s
build on macos (macos-latest-xlarge)	48s
build on debian:12 (clang,false)	1m 36s
build on debian:11 (gcc,false)	1m 16s
build on debian:11 (clang,false)	1m 36s
run unit tests (ubuntu:22.04, clang)	13m 11s
run unit tests (fedora:40, gcc)	16m 25s
	55m 7s

Provide feedback