Return RunFailed error

[chunshao90]

Describe this problem

When cases fail to run, sqlness return 0as the result which means success.
run_env needs to return errors up instead of logging.
Refer to

sqlness/src/runner.rs

Line 80 in 20db562

if let Err(e) = self.run_env(&env, &db).await {

.

Steps to reproduce

1. Define a wrong case, run sqlness.
2. echo $? will return 0 while the correct result should be 1.

Expected behavior

No response

Additional Information

No response