Refactor: various: Replace pcmklog_else() with pcmkif_tracing()

The new macro executes one action if tracing is enabled or another
action if tracing is not enabled. We give up the ability to select based
on log level (now we hard-code LOG_TRACE), but the existing callers only
use LOG_TRACE anyway.

Ref T559

Signed-off-by: Reid Wahl <nrwahl@protonmail.com>