dtrace: use perf_events probes

dtrace: use perf_events probes

For every trace point defined, also define an SDT probe. This allows
DTrace to expose probe points maintained by upstream.

[nca: fixed TODOs: added DTRACE_UINTPTR_CAST_EACH so that tracepoints
      that pass structures by value will still compile: we jam the
      structure into a uintptr if it will fit, otherwise passing its
      address in.

      This is only partial, so far: there is no CTF type info for any
      of these new probes, but this is a relatively minor issue that can
      be fixed later.]

Orabug: 23004534
Signed-off-by: Timothy J Fontaine <tj.fontaine@oracle.com>
Signed-off-by: Nick Alcock <nick.alcock@oracle.com>
Acked-by: Kris Van Hees <kris.van.hees@oracle.com>