Feature/fast sync update

[sanblch]

Referenced issues

#1164

Description of the Change

Adds /dot/state/2 protocol
Adds fast syn functionality

Benefits

--sync Fast gives faster synchronization option

Possible Drawbacks

not well tested behavior on peer response error at state syncing
restart of synced node with fast sync option is undefined

Usage Examples or Tests

Alternate Designs

[codecov]

Codecov Report

Merging #1284 (82452cb) into master (e341962) will decrease coverage by 0.39%.
The diff coverage is 5.67%.

❗ Current head 82452cb differs from pull request most recent head 866a6d0. Consider uploading reports for the commit 866a6d0 to get more accurate results

@@            Coverage Diff             @@
##           master    #1284      +/-   ##
==========================================
- Coverage   25.36%   24.97%   -0.40%     
==========================================
  Files         607      610       +3     
  Lines       22109    22553     +444     
  Branches    11490    11779     +289     
==========================================
+ Hits         5609     5633      +24     
- Misses      11328    11718     +390     
- Partials     5172     5202      +30     

Impacted Files	Coverage Δ
core/application/app_configuration.hpp	100.00% <ø> (ø)
core/application/impl/app_configuration_impl.hpp	28.37% <0.00%> (-0.79%)	⬇️
core/consensus/babe/babe.hpp	100.00% <ø> (ø)
core/consensus/babe/impl/babe_impl.hpp	100.00% <ø> (ø)
core/consensus/grandpa/impl/environment_impl.cpp	11.88% <ø> (+0.11%)	⬆️
core/consensus/grandpa/impl/grandpa_impl.cpp	2.64% <0.00%> (-0.08%)	⬇️
core/consensus/grandpa/impl/grandpa_impl.hpp	100.00% <ø> (ø)
core/consensus/grandpa/impl/voting_round_impl.hpp	36.36% <ø> (ø)
core/log/configurator.cpp	22.22% <ø> (ø)
...ore/network/impl/protocols/state_protocol_impl.cpp	0.00% <0.00%> (ø)
... and 17 more

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