75a185ea3d test: add skip_if_running_under_valgrind() (fanquake)
Pull request description:
Enable it in the USDT tests. The context (from 0xB10C):
> every time the tracepoint is reached a SIGTRAP is fired.
> No matter the tracepoint contents, even with an empty one.
> Valgrind intercepts SIGTRAP and aborts.
See discussion in #32374.
ACKs for top commit:
maflcko:
lgtm ACK 75a185ea3d
willcl-ark:
ACK 75a185ea3d
Tree-SHA512: 7f45c3049ab39cc514024067bd6ac26598e99202c114b48459834c26c2e1273fa58af693878298e628a10c561b954850e49e76b39567b771bb0c0534a063a524