tests: factor out a part common to many simply organized test scripts

tests: factor out a part common to many simply organized test scripts

* tests/init.sh (run_strace_match_diff): New function.
* tests/acct.test: Rewrite using run_strace_match_diff.
* tests/aio.test: Likewise.
* tests/alarm.test: Likewise.
* tests/chmod.test: Likewise.
* tests/clock_nanosleep.test: Likewise.
* tests/clock_xettime.test: Likewise.
* tests/copy_file_range.test: Likewise.
* tests/creat.test: Likewise.
* tests/dup.test: Likewise.
* tests/dup2.test: Likewise.
* tests/dup3.test: Likewise.
* tests/epoll_create1.test: Likewise.
* tests/execveat-v.test: Likewise.
* tests/execveat.test: Likewise.
* tests/fchmod.test: Likewise.
* tests/fcntl.test: Likewise.
* tests/file_handle.test: Likewise.
* tests/flock.test: Likewise.
* tests/fork-f.test: Likewise.
* tests/ftruncate.test: Likewise.
* tests/ftruncate64.test: Likewise.
* tests/getcwd.test: Likewise.
* tests/getdents.test: Likewise.
* tests/getdents64.test: Likewise.
* tests/getrandom.test: Likewise.
* tests/getrusage.test: Likewise.
* tests/getxxid.test: Likewise.
* tests/inet-cmsg.test: Likewise.
* tests/init.sh: Likewise.
* tests/membarrier.test: Likewise.
* tests/mincore.test: Likewise.
* tests/mknod.test: Likewise.
* tests/mlock2.test: Likewise.
* tests/mmsg.test: Likewise.
* tests/nanosleep.test: Likewise.
* tests/open.test: Likewise.
* tests/openat.test: Likewise.
* tests/pselect6.test: Likewise.
* tests/readdir.test: Likewise.
* tests/readlink.test: Likewise.
* tests/readv.test: Likewise.
* tests/recvmsg.test: Likewise.
* tests/rename.test: Likewise.
* tests/renameat.test: Likewise.
* tests/rt_sigpending.test: Likewise.
* tests/rt_sigprocmask.test: Likewise.
* tests/rt_sigqueueinfo.test: Likewise.
* tests/rt_sigsuspend.test: Likewise.
* tests/rt_sigtimedwait.test: Likewise.
* tests/rt_tgsigqueueinfo.test: Likewise.
* tests/sched_get_priority_mxx.test: Likewise.
* tests/sched_xetaffinity.test: Likewise.
* tests/sched_xetparam.test: Likewise.
* tests/sched_xetscheduler.test: Likewise.
* tests/seccomp.test: Likewise.
* tests/select.test: Likewise.
* tests/sendfile.test: Likewise.
* tests/sendfile64.test: Likewise.
* tests/splice.test: Likewise.
* tests/statx.sh: Likewise.
* tests/sysinfo.test: Likewise.
* tests/syslog.test: Likewise.
* tests/tee.test: Likewise.
* tests/time.test: Likewise.
* tests/timer_create.test: Likewise.
* tests/timer_xettime.test: Likewise.
* tests/timerfd_xettime.test: Likewise.
* tests/times-fail.test: Likewise.
* tests/times.test: Likewise.
* tests/truncate.test: Likewise.
* tests/truncate64.test: Likewise.
* tests/umask.test: Likewise.
* tests/umount.test: Likewise.
* tests/umount2.test: Likewise.
* tests/userfaultfd.test: Likewise.
* tests/vmsplice.test: Likewise.
* tests/xet_robust_list.test: Likewise.
* tests/xetitimer.test: Likewise.
* tests/xetpgid.test: Likewise.
* tests/xetpriority.test: Likewise.
* tests/xettimeofday.test: Likewise.