Fix golangci-lint errors (#10196)

* Fix golangci-lint errors

Signed-off-by: z1cheng <imchench@gmail.com>

* Fix dupl errors

Signed-off-by: z1cheng <imchench@gmail.com>

* Fix comments

Signed-off-by: z1cheng <imchench@gmail.com>

* Fix errcheck lint errors

Signed-off-by: z1cheng <imchench@gmail.com>

* Fix assert in e2e test

Signed-off-by: z1cheng <imchench@gmail.com>

* Not interrupt the waitForPodsReady

Signed-off-by: z1cheng <imchench@gmail.com>

* Replace string with constant

Signed-off-by: z1cheng <imchench@gmail.com>

* Fix comments

Signed-off-by: z1cheng <imchench@gmail.com>

* Revert write file permision

Signed-off-by: z1cheng <imchench@gmail.com>

---------

Signed-off-by: z1cheng <imchench@gmail.com>

internal/net/net_test.go

@@ -47,7 +47,7 @@ func TestIsPortAvailable(t *testing.T) {
 		t.Fatal("expected port 0 to be available (random port) but returned false")
 	}
 
-	ln, err := net.Listen("tcp", ":0")
+	ln, err := net.Listen("tcp", ":0") //nolint:gosec // Ignore the gosec error in testing
 	if err != nil {
 		t.Fatalf("unexpected error: %v", err)
 	}