Use checkpoint info cache

[terencechain]

What type of PR is this?

Feature

What does this PR do? Why is it needed?

• We hooked up sync service and core attestation service to use check point info cache to verify attestation signatures.
• Due to this radical improvement, we reduce hot state cache size from 32 to 16. This reduces memory usages by 400-600MB
• Use feature flag --use-check-point-cache

Which issues(s) does this PR fix?

Deprecates #7048

Other notes for review

Gated by feature flag and tested run time.

[codecov]

Codecov Report

Merging #7098 into master will increase coverage by 2.12%.
The diff coverage is 70.47%.

@@            Coverage Diff             @@
##           master    #7098      +/-   ##
==========================================
+ Coverage   60.07%   62.19%   +2.12%     
==========================================
  Files         323      406      +83     
  Lines       27422    31769    +4347     
==========================================
+ Hits        16473    19759    +3286     
- Misses       8733     9192     +459     
- Partials     2216     2818     +602