configure: Check STAP_PROBEV macro when building with USDT tracing

It turns out that STAP_PROBEV() is not available on FreeBSD thus having
sdt/sdt.h is not enough. Look for it now at configure time.

Closes #40174

Signed-off-by: David Goulet <dgoulet@torproject.org>
9 jobs for ticket40174_045_01 in 71 minutes and 29 seconds (queued for 34 minutes and 18 seconds)
latest
Status Job ID Name Coverage
  Test
passed #4868
debian-disable-dirauth

00:05:48

passed #4869
debian-disable-relay

00:05:47

passed #4864
debian-distcheck

00:13:41

passed #4865
debian-docs

00:10:29

passed #4863
debian-hardened

00:20:33

passed #4866
debian-integration

00:14:37

passed #4862
debian-minimal

00:13:09

passed #4870
debian-nss

00:05:39

passed #4867
debian-tracing

00:12:41