Replace all locks in meta with a single lock

[critical27]

After 1230 there won't be too much write in meta, so a single global lock is enough. Don't add so many lock, which is complicated, easy to forget, and error prone.

We can do it after 1230

[critical27]

This issue involves two aspects:

1. Check every lock in LockUtils, unify them as much as possible. For example, use only one lock when related to schema, such as space/tag/edge/index/group/zone..., the remaining locks need to be considered as well.
2. Make sure only one data write in every meta processors, especially pay attention to ActiveHostsMan and LastUpdateMan