refactor!(apis): add `WALProvider` and `FileStorage` to support create standalone wal and cache storage

[zyy17]

What's changed

1. Add WALProvider and FileStorage to support create standalone wal and cache storage;
2. Add Logging field to configure component logging;
3. Add multiple field access functions for GreptimeDBCluster and GreptimeDBStandalone;
4. Add ,inline tag for dbconfig package;
5. Add Validate() and Check() for GreptimeDBCluster and GreptimeDBStandalone;