chore(server): mark old raft configs as deprecated

[shirleyStorage]

Purpose of the PR

• close https://github.com/apache/incubator-hugegraph/issues/2660

Main Changes

Place the raft configurations at the bottom of the properties file and mark it as being deprecated.

Verifying these changes

• [x] Trivial rework / code cleanup without any test coverage. (No Need)
• [ ] Already covered by existing tests, such as (please modify tests here).
• [ ] Need tests and can be verified as follows:
  • xxx

Does this PR potentially affect the following parts?

• [ ] Dependencies (add/update license info & regenerate_dependencies)
• [ ] Modify configurations
• [ ] The public API
• [ ] Other affects (typed here)
• [x] Nope

Documentation Status

• [ ] Doc - TODO
• [ ] Doc - Done
• [x] Doc - No Need

[shirleyStorage]

@imbajin PTAL~ This PR is related to "Mark raft-mode configs as legacy (put them on the bottom - properties)" of https://github.com/apache/incubator-hugegraph/issues/2575

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 38.42%. Comparing base (a529c02) to head (84b3caf). Report is 1 commits behind head on master.

:exclamation: There is a different number of reports uploaded between BASE (a529c02) and HEAD (84b3caf). Click for more details.

HEAD has 5 uploads less than BASE

| Flag | BASE (a529c02) | HEAD (84b3caf) | |------|------|------| ||7|2|

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #2661 +/- ## ============================================ - Coverage 47.60% 38.42% -9.19% + Complexity 820 632 -188 ============================================ Files 718 718 Lines 58469 58469 Branches 7496 7496 ============================================ - Hits 27835 22467 -5368 - Misses 27854 33596 +5742 + Partials 2780 2406 -374 ```

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