fix(core-p2p): accept requests to /transactions regardless of suspension

[spkjp]

Summary

This is giving relays with closed p2p ports a hard time broadcasting transactions. Therefore it's best to accept incoming /transactions POST requests.

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 #2503 into master will not change coverage.
The diff coverage is 0%.

@@           Coverage Diff           @@
##           master    #2503   +/-   ##
=======================================
  Coverage   66.07%   66.07%           
=======================================
  Files         400      400           
  Lines        8614     8614           
  Branches      436      395   -41     
=======================================
  Hits         5692     5692           
- Misses       2877     2878    +1     
+ Partials       45       44    -1

Impacted Files	Coverage Δ
...ages/core-p2p/src/server/plugins/accept-request.ts	0% <0%> (ø)	⬆️
packages/core-logger-winston/src/formatter.ts	42.85% <0%> (ø)	⬆️

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