Problem: memiavl is not integrated in production version

[yihuang]

Solution:

• experimental integration of memiavl into v1.0.x
• removed versiondb/memiavl module, use the standalone memiavl package on main branch directly.
• mainly for internal testing on production chain, should have no side-effect if don't turn if on.

👮🏻👮🏻👮🏻 !!!! REFERENCE THE PROBLEM YOUR ARE SOLVING IN THE PR TITLE AND DESCRIBE YOUR SOLUTION HERE !!!! DO NOT FORGET !!!! 👮🏻👮🏻👮🏻

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)
• If you added any dependencies, have you checked they do not contain any known vulnerabilities? (go list -json -m all | nancy sleuth)
• If your changes affect the client infrastructure, have you run the integration test?
• If your changes affect public APIs, does your PR follow the C4 evolution of public contracts?
• If your code changes public APIs, have you incremented the crate version numbers and documented your changes in the CHANGELOG.md?
• 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 #984 (25f28e8) into release/v1.0.x (67b0c61) will decrease coverage by 5.23%.
The diff coverage is 18.60%.

@@                Coverage Diff                 @@
##           release/v1.0.x     #984      +/-   ##
==================================================
- Coverage           36.71%   31.49%   -5.23%     
==================================================
  Files                  53       47       -6     
  Lines                3908     3312     -596     
==================================================
- Hits                 1435     1043     -392     
+ Misses               2306     2166     -140     
+ Partials              167      103      -64     

Impacted Files	Coverage Δ
versiondb/client/restore_app_db.go	0.00% <0.00%> (ø)
versiondb/client/verify.go	0.00% <0.00%> (ø)
versiondb/client/changeset.go	43.83% <100.00%> (ø)
versiondb/client/convert_to_sst.go	29.23% <100.00%> (ø)

[thomas-nguy]

.