chore: p2p rate limit call later max limit

[alexruzenhack]

Acceptance criteria

• Add a stop limit for the list of delayed calls

Related to: #650
Related to: https://github.com/HathorNetwork/on-call-incidents/issues/123

[codecov]

Codecov Report

Merging #657 (e7868bf) into master (89a001c) will decrease coverage by 0.06%.
The diff coverage is 100.00%.

❗ Current head e7868bf differs from pull request most recent head 292550f. Consider uploading reports for the commit 292550f to get more accurate results

@@            Coverage Diff             @@
##           master     #657      +/-   ##
==========================================
- Coverage   83.85%   83.80%   -0.06%     
==========================================
  Files         247      246       -1     
  Lines       20399    20323      -76     
  Branches     2757     2754       -3     
==========================================
- Hits        17106    17031      -75     
+ Misses       2712     2711       -1     
  Partials      581      581              

Impacted Files	Coverage Δ
hathor/conf/settings.py	97.05% <100.00%> (+0.02%)	⬆️
hathor/p2p/node_sync.py	85.01% <100.00%> (-0.13%)	⬇️

... and 18 files with indirect coverage changes