Refactor Promise in vm-logic. Remove inner type

[evgenykuzyakov]

Simplifying Promise type within VMLogic.

[codecov]

Codecov Report

Merging #1978 into staging will decrease coverage by 0.3%.
The diff coverage is 55.45%.

@@             Coverage Diff             @@
##           staging    #1978      +/-   ##
===========================================
- Coverage    87.49%   87.19%   -0.31%     
===========================================
  Files          167      167              
  Lines        31779    31944     +165     
===========================================
+ Hits         27804    27852      +48     
- Misses        3975     4092     +117

Impacted Files	Coverage Δ
core/primitives/src/views.rs	59.83% <ø> (ø)	⬆️
chain/client/src/lib.rs	0% <ø> (ø)	⬆️
chain/client/src/types.rs	80.46% <ø> (-1.57%)	⬇️
chain/chain/src/types.rs	97.97% <ø> (ø)	⬆️
chain/jsonrpc/client/src/lib.rs	83.58% <ø> (ø)	⬆️
core/store/src/db.rs	79.85% <0%> (-7.86%)	⬇️
core/store/src/lib.rs	88.88% <0%> (-2.68%)	⬇️
chain/client/src/view_client.rs	70.52% <0%> (-0.99%)	⬇️
runtime/runtime/src/state_viewer.rs	92.61% <100%> (+0.04%)	⬆️
runtime/runtime/src/lib.rs	82.34% <100%> (+0.16%)	⬆️
... and 42 more

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