add new db snapshot migration

[devyetii]

Changes

Fixes

Tests

Tasks to complete before merging PR:

• [ ] Ensure system tests are passing. If not Run them manually to check for any regressions :clipboard:
• [ ] Do any new system tests need added to test this change? do any existing system tests need updated? If so create a PR at 0chain/system_test
• [ ] Merge your system tests PR to master AFTER merging this PR

Associated PRs (Link as appropriate):

• 0chain:
• gosdk:
• system_test:
• zboxcli:
• zwalletcli:
• Other: ...

[codecov-commenter]

Codecov Report

Merging #1312 (85646cd) into sprint-1.11 (577752c) will not change coverage. The diff coverage is n/a.

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@@             Coverage Diff              @@
##           sprint-1.11    #1312   +/-   ##
============================================
  Coverage        23.78%   23.78%           
============================================
  Files               88       88           
  Lines            10052    10052           
============================================
  Hits              2391     2391           
  Misses            7364     7364           
  Partials           297      297           

Flag	Coverage Δ
Unit-Tests	23.78% <ø> (ø)

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