fix test cleanup: ignore deletion errors and propagate panics properly

Replace assert-based cleanup with straightforward deletion calls and
explicit panic propagation via resume_unwind. This ensures that
cleanup failures don't mask test results, and panicked tests properly
unwind through the cleanup code.

Signed-off-by: Gris Ge <cnfourt@gmail.com>

Author: cathay4t

src/ip/link/tests/bond.rs

@@ -84,5 +84,8 @@ where
     // clean up
     exec_cmd(&["ip", "link", "del", dummy_name]);
     exec_cmd(&["ip", "link", "del", bond_name]);
-    assert!(result.is_ok())
+
+    if let Err(e) = result {
+        std::panic::resume_unwind(e);
+    }
 }

src/ip/link/tests/bridge.rs

@@ -198,5 +198,8 @@ where
     // clean up
     exec_cmd(&["ip", "link", "del", dummy_name]);
     exec_cmd(&["ip", "link", "del", br_name]);
-    assert!(result.is_ok())
+
+    if let Err(e) = result {
+        std::panic::resume_unwind(e);
+    }
 }

src/ip/link/tests/dummy.rs

@@ -76,5 +76,8 @@ where
 
     // clean up
     exec_cmd(&["ip", "link", "del", name]);
-    assert!(result.is_ok())
+
+    if let Err(e) = result {
+        std::panic::resume_unwind(e);
+    }
 }

src/ip/link/tests/nlmon.rs

@@ -68,5 +68,8 @@ where
 
     // clean up
     exec_cmd(&["ip", "link", "del", name]);
-    assert!(result.is_ok())
+
+    if let Err(e) = result {
+        std::panic::resume_unwind(e);
+    }
 }

src/ip/link/tests/vlan.rs

@@ -283,5 +283,8 @@ where
     // clean up
     exec_cmd(&["ip", "link", "del", vlan_name]);
     exec_cmd(&["ip", "link", "del", &parent_name]);
-    assert!(result.is_ok())
+
+    if let Err(e) = result {
+        std::panic::resume_unwind(e);
+    }
 }

src/ip/link/tests/vxlan.rs

@@ -67,5 +67,8 @@ where
 
     // clean up
     exec_cmd(&["ip", "link", "del", vxlan_name]);
-    assert!(result.is_ok())
+
+    if let Err(e) = result {
+        std::panic::resume_unwind(e);
+    }
 }