Problem: state-sync snapshot is not saved locally for local restoration

[yihuang]

• Restoration is slow, it's useful to save the chunks first and try local restoration later.

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PR Checklist:

• Have you read the CONTRIBUTING.md?
• Does your PR follow the C4 patch requirements?
• Have you rebased your work on top of the latest master?
• Have you checked your code compiles? (make)
• Have you included tests for any non-trivial functionality?
• Have you checked your code passes the unit tests? (make test)
• Have you checked your code formatting is correct? (go fmt)
• Have you checked your basic code style is fine? (golangci-lint run)
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• If you are contributing for the first time, please read the agreement in CONTRIBUTING.md now and add a comment to this pull request stating that your PR is in accordance with the Developer's Certificate of Origin.

Thank you for your code, it's appreciated! :)

[codecov]

Codecov Report

Merging #1022 (a65556d) into main (6765a82) will decrease coverage by 0.09%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##             main    #1022      +/-   ##
==========================================
- Coverage   45.32%   45.23%   -0.09%     
==========================================
  Files          80       81       +1     
  Lines        6718     6731      +13     
==========================================
  Hits         3045     3045              
- Misses       3354     3367      +13     
  Partials      319      319              

Impacted Files	Coverage Δ
app/snapshot.go	0.00% <0.00%> (ø)

[yihuang]

ported to cosmos-sdk: cosmos/cosmos-sdk#16060