fix(core-forger): update configManager height

[spkjp]

Summary

We need to ensure the configManager is always on the same height as the block that is about to be forged. Otherwise the forger can run into trouble when milestones alter the transaction validation. Currently this is only guaranteed when forger and relay run in the same process.

What kind of change does this PR introduce?

• Bugfix
• New feature
• Refactoring / Performance Improvements
• Build-related changes
• Documentation
• Tests / Continuous Integration
• Other, please describe:

Does this PR introduce a breaking change?

• Yes
• No

Does this PR release a new version?

• Yes
  • All tests are passing
  • All benchmarks are passing without any major regressions
  • Sync from 0 works on mainnet
  • Sync from 0 works on devnet
  • Starting a new network and forging on it work
  • Explorer is fully functional
  • Wallets are fully functional
• No

Checklist

• I have read the CONTRIBUTING documentation
• Lint and unit tests pass locally with my changes
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)

[codecov-io]

Codecov Report

Merging #2487 into master will increase coverage by <.01%.
The diff coverage is 100%.

@@            Coverage Diff            @@
##           master   #2487      +/-   ##
=========================================
+ Coverage   66.09%   66.1%   +<.01%     
=========================================
  Files         400     400              
  Lines        8610    8611       +1     
  Branches      394     435      +41     
=========================================
+ Hits         5691    5692       +1     
+ Misses       2875    2874       -1     
- Partials       44      45       +1

Impacted Files	Coverage Δ
packages/core-forger/src/manager.ts	65.93% <100%> (+0.37%)	⬆️
packages/core-logger-winston/src/formatter.ts	42.85% <0%> (ø)	⬆️

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