Replace assert.Fail with assert.FailNow (#27578)

assert.Fail() will continue to execute the code while assert.FailNow()
not. I thought those uses of assert.Fail() should exit immediately.
PS: perhaps it's a good idea to use
[require](https://pkg.go.dev/github.com/stretchr/testify/require)
somewhere because the assert package's default behavior does not exit
when an error occurs, which makes it difficult to find the root error
reason.

models/asymkey/ssh_key_test.go

@@ -51,7 +51,7 @@ func Test_SSHParsePublicKey(t *testing.T) {
 				if err != nil {
 					// Some servers do not support ecdsa format.
 					if !strings.Contains(err.Error(), "line 1 too long:") {
-						assert.Fail(t, "%v", err)
+						assert.FailNow(t, "%v", err)
 					}
 				}
 				assert.Equal(t, tc.keyType, keyTypeK)
@@ -60,7 +60,7 @@ func Test_SSHParsePublicKey(t *testing.T) {
 			t.Run("SSHParseKeyNative", func(t *testing.T) {
 				keyTypeK, lengthK, err := SSHNativeParsePublicKey(tc.content)
 				if err != nil {
-					assert.Fail(t, "%v", err)
+					assert.FailNow(t, "%v", err)
 				}
 				assert.Equal(t, tc.keyType, keyTypeK)
 				assert.EqualValues(t, tc.length, lengthK)