rv: Unify DA event handling functions across monitor types

rv: Unify DA event handling functions across monitor types

The DA event handling functions are mostly duplicated because the
per-task monitors need to propagate the task struct while others do not.

Unify the functions, handle the difference by always passing an
identifier which is the task's pid for per-task monitors but is ignored
for the other types. Only keep the actual tracepoint calling separated.

Reviewed-by: Nam Cao <namcao@linutronix.de>
Link: https://lore.kernel.org/r/20260330111010.153663-2-gmonaco@redhat.com
Signed-off-by: Gabriele Monaco <gmonaco@redhat.com>