use errors.New to replace fmt.Errorf with no parameters
Signed-off-by: RiceChuan <lc582041246@gmail.com>
(cherry picked from commit dfd75944992fc6508ec891b4c29715c23e59e4ed)
Related to #22362.
I overlooked that there's always `committer.Close()`, like:
```go
ctx, committer, err := db.TxContext(db.DefaultContext)
if err != nil {
return nil
}
defer committer.Close()
// ...
if err != nil {
return nil
}
// ...
return committer.Commit()
```
So the `Close` of `halfCommitter` should ignore `commit and close`, it's
not a rollback.
See: [Why `halfCommitter` and `WithTx` should rollback IMMEDIATELY or
commit
LATER](https://github.com/go-gitea/gitea/pull/22366#issuecomment-1374778612).
Co-authored-by: techknowlogick <techknowlogick@gitea.io>
