fix(ebpf): use log debug level instead of error... (#3985)

... for internal requirements.

Considering that if GetLast() failed t.config.Policies is nil, this also
removes the use of t.config.Policies. Furthermore, the goal is to
concetrate all Policies access in the PolicyManager.

pkg/ebpf/tracee.go

@@ -1592,15 +1592,14 @@ func (t *Tracee) triggerMemDump(event trace.Event) []error {
 	// We want to use the policies of relevant to the triggering event
 	policies, err := policy.Snapshots().Get(event.PoliciesVersion)
 	if err != nil {
-		logger.Errorw("Error getting policies for print_mem_dump event", "error", err)
-		// For fallback, try to use latest polcies
+		logger.Debugw("Error getting policies for print_mem_dump event", "error", err)
+		// For fallback, try to use latest policies
 		policies, err = policy.Snapshots().GetLast()
 		if err != nil {
-			logger.Errorw("Error getting last snapshots policies for print_mem_dump event", "error", err)
-			// Last resort is to use the policies from the config
-			policies = t.config.Policies
+			return []error{err}
 		}
 	}
+
 	for it := policies.CreateAllIterator(); it.HasNext(); {
 		p := it.Next()
 		// This might break in the future if PrintMemDump will become a dependency of another event.