Should allow TiDB startup even if some system data lost

## Enhancement
Some data was lost, and after doing "online-recovery --auto-detect" according to docs https://docs.pingcap.com/tidb/stable/online-unsafe-recovery, all-region in tikv is available, but tidb can't start up due to following error:
```
[2024/09/23 13:46:03.026 +08:00] [FATAL] [terror.go:300] ["unexpected error"] [error="[executor:8117]Result is empty"] [stack="github.com/pingcap/tidb/parser/terror.MustNil\n\t/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/tidb/parser/terror/terror.go:300\nmain.createStoreAndDomain\n\t/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/tidb/tidb-server/main.go:315\nmain.main\n\t/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/tidb/tidb-server/main.go:214\nruntime.main\n\t/usr/local/go/src/runtime/proc.go:250"] [stack="github.com/pingcap/tidb/parser/terror.MustNil\n\t/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/tidb/parser/terror/terror.go:300\nmain.createStoreAndDomain\n\t/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/tidb/tidb-server/main.go:315\nmain.main\n\t/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/tidb/tidb-server/main.go:214\nruntime.main\n\t/usr/local/go/src/runtime/proc.go:250"]
```