Problem: memiavl zero-copy don't work with inter-block cache

[yihuang]

Solution:

• ignore the inter-block cache silently
• roll it's own cache in memiavl trees

👮🏻👮🏻👮🏻 !!!! 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 #1035 (972bdf9) into main (dfa887d) will decrease coverage by 0.25%.
The diff coverage is 76.47%.

@@            Coverage Diff             @@
##             main    #1035      +/-   ##
==========================================
- Coverage   46.55%   46.30%   -0.25%     
==========================================
  Files          82       82              
  Lines        7091     7112      +21     
==========================================
- Hits         3301     3293       -8     
- Misses       3443     3470      +27     
- Partials      347      349       +2     

Impacted Files	Coverage Δ
app/memiavl.go	10.52% <0.00%> (-89.48%)	⬇️
versiondb/client/restore_app_db.go	0.00% <0.00%> (ø)
versiondb/client/verify.go	0.00% <0.00%> (ø)
memiavl/tree.go	77.84% <75.00%> (-2.02%)	⬇️
memiavl/db.go	58.10% <88.88%> (+2.31%)	⬆️
app/config/config.go	100.00% <100.00%> (ø)
memiavl/multitree.go	73.40% <100.00%> (+0.18%)	⬆️

... and 1 file with indirect coverage changes