chore(gateway): remove log around "No NAT session" (#8227)

This is pretty confusing when reading logs. For inbound packets, we
assume that if we don't have a NAT session, they belong to the Internet
Resource or a CIDR resource, meaning this log shows up for all packets
for those resources and even for packets that don't belong to any
resource at all.

rust/connlib/tunnel/src/peer.rs

@@ -307,7 +307,11 @@ impl ClientOnGateway {
 
                 return Ok(None);
             }
-            TranslateIncomingResult::NoNatSession => return Ok(Some(packet)),
+            TranslateIncomingResult::NoNatSession => {
+                // No NAT session means packet is likely for Internet Resource or a CIDR resource.
+
+                return Ok(Some(packet));
+            }
         };
 
         let mut packet = packet

rust/connlib/tunnel/src/peer/nat_table.rs

@@ -102,8 +102,6 @@ impl NatTable {
                 return Ok(TranslateIncomingResult::ExpiredNatSession);
             }
 
-            tracing::trace!(?outside, "No active NAT session; skipping translation");
-
             return Ok(TranslateIncomingResult::NoNatSession);
         }
 
@@ -117,8 +115,6 @@ impl NatTable {
             return Ok(TranslateIncomingResult::ExpiredNatSession);
         }
 
-        tracing::trace!(?outside, "No active NAT session; skipping translation");
-
         Ok(TranslateIncomingResult::NoNatSession)
     }