[To rel/0.13] [OTDB-4089] Storage Group add attribute "number of Virtual Storage Groups"

[GuanchuShen]

Description

Different storage groups are supported with different number of virtual storage groups.

Content1 ...

Support SQL，e.g. create storage group root.sgc virtualstoragegroupnum = 8;

Content2 ...

Enhanced "show storage group" SQL statement，e.g. show storage group; This SQL statement can display two columns: storage group, virtual storage group num.

Content3 ...

Compatible with older version of mlog(without virtual storage group num).

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This PR has:

• [ ] been self-reviewed.
  • [ ] concurrent read
  • [ ] concurrent write
  • [ ] concurrent read and write
• [ ] added documentation for new or modified features or behaviors.
• [ ] added Javadocs for most classes and all non-trivial methods.
• [ ] added or updated version, license, or notice information
• [ ] added comments explaining the "why" and the intent of the code wherever would not be obvious for an unfamiliar reader.
• [ ] added unit tests or modified existing tests to cover new code paths, ensuring the threshold for code coverage.
• [ ] added integration tests.
• [ ] been tested in a test IoTDB cluster.

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Key changed/added classes (or packages if there are too many classes) in this PR