New version of runtime API for calculate state root

[xDimon]

Signed-off-by: Dmitriy Khaustov aka xDimon khaustov.dm@gmail.com

Referenced issues

Resolves #1122

Description of the Change

Added version 2 for two host API methods (code for new way is stubbed now, as in substrate)
Added data structures for new types of trie nodes

Benefits

Ability to continue syncing till stubbed way won't be implemented actually

[codecov]

Codecov Report

Merging #1183 (80a63e1) into master (778a051) will decrease coverage by 0.08%.
The diff coverage is 19.54%.

@@            Coverage Diff             @@
##           master    #1183      +/-   ##
==========================================
- Coverage   27.84%   27.76%   -0.09%     
==========================================
  Files         553      553              
  Lines       19473    19617     +144     
  Branches    10085    10119      +34     
==========================================
+ Hits         5422     5446      +24     
- Misses       9205     9317     +112     
- Partials     4846     4854       +8     

Impacted Files	Coverage Δ
core/consensus/babe/types/babe_block_header.hpp	90.90% <ø> (ø)
core/host_api/host_api.hpp	100.00% <ø> (ø)
core/host_api/impl/host_api_impl.cpp	15.27% <0.00%> (-0.37%)	⬇️
core/host_api/impl/host_api_impl.hpp	100.00% <ø> (ø)
core/primitives/authority.hpp	91.66% <ø> (ø)
core/primitives/digest.hpp	33.33% <0.00%> (-2.78%)	⬇️
core/primitives/transaction.hpp	20.00% <ø> (ø)
...re/runtime/binaryen/runtime_external_interface.cpp	30.09% <0.00%> (-0.63%)	⬇️
...re/runtime/wavm/intrinsics/intrinsic_functions.cpp	0.00% <0.00%> (ø)
core/storage/trie/impl/trie_storage_impl.cpp	40.74% <0.00%> (ø)
... and 13 more

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