We need benchmarks for mutex, SpinLock and condition variable

### Search before asking

- [x] I searched the [issues](https://github.com/alibaba/async_simple/issues) and found no similar issues.

### Why

It is better to have benchmarks for new added things mutex, SpinLock and condition variable.

### Are you willing to submit a PR?

- [x] Yes I am willing to submit a PR!

No files, tests, benchmark framework, or entry points are named. First locate the existing benchmark setup and the mutex, SpinLock, and condition-variable implementations, then determine how comparable measurements are recorded; done means benchmarks cover all three components and run through the repository's normal benchmark process.

Written by the indexing model from the issue text.