[Feature(compaction, 2.3)]: input-file-caches in compaction; statement show compaction; some refactors

[zipper-meng]

Required checklist

• Sample config files updated (config,meta/config and default config)
• If there are user-facing changes, the documentation needs to be updated prior to approving the PR( Link )
• If there are any breaking changes to public APIs, please add the api change label.
• Signed CLA (if not already signed)

Which issue does this PR close?

Related #.

Rationale for this change

Add config compact_file_cache_size to set the cache size of TSM files.

By default this value is '16M'.

[storage]
## The size of cache for each compacting files
#compact_file_cache_size = "16M"

Add statement SHOW COMPACTION ON NODE <node_id>

public ❯ show compaction on node 1001;
+----------+----------+---------+
| vnode_id | elapsed  | state   |
+----------+----------+---------+
| 3        | 00:00:10 | Running |
+----------+----------+---------+

Merge two script compact.rs and delta_compact.rs.

Are there any user-facing changes?

Support to show running compactions by statement SHOW COMPACTION ON NODE <node_id>.

[zipper-meng]

It's some work to fix #1356.