feat: write manifests in background tasks (#3709)

* chore: truncate wip

* feat: truncate and edit write manifest in background

* refactor: wrap in manifest context

* feat: alter write manifest in background

* chore: fix compiler errors

* feat: flush update manifest in background

* feat: compaction update manifest in background

* feat: set dropping state

* feat: reset drop state

* feat: check state before updating manifest

* test: fix compaction test

* refactor: rename method

* chore: update comment

* chore: discard state guard

* refactor: use atomic cell to store state enum

* chore: fix clippy

* chore: update toml

* chore: remove unused type alias

* feat: check state after writing manifest

* chore: address CR comments

* chore: change status code

* chore: Update src/mito2/src/region.rs

Co-authored-by: Lei, HUANG <6406592+v0y4g3r@users.noreply.github.com>

* fix: executes applier

---------

Co-authored-by: Lei, HUANG <6406592+v0y4g3r@users.noreply.github.com>

src/common/error/src/status_code.rs

@@ -59,6 +59,7 @@ pub enum StatusCode {
     RegionNotFound = 4005,
     RegionAlreadyExists = 4006,
     RegionReadonly = 4007,
+    /// Region is not in a proper state to handle specific request.
     RegionNotReady = 4008,
     // If mutually exclusive operations are reached at the same time,
     // only one can be executed, another one will get region busy.