Integrate NeoFS into oracle module

[fyrchik]

Close #1473 .

[codecov]

Codecov Report

Merging #1484 (22b4edd) into master (f087775) will decrease coverage by 0.17%.
The diff coverage is 32.18%.

@@            Coverage Diff             @@
##           master    #1484      +/-   ##
==========================================
- Coverage   83.54%   83.37%   -0.18%     
==========================================
  Files         272      273       +1     
  Lines       21907    21995      +88     
==========================================
+ Hits        18303    18339      +36     
- Misses       2489     2543      +54     
+ Partials     1115     1113       -2     

Impacted Files	Coverage Δ
pkg/services/oracle/request.go	51.51% <0.00%> (-5.87%)	⬇️
pkg/services/oracle/neofs/neofs.go	36.36% <36.36%> (ø)
pkg/vm/emit/emit.go	100.00% <0.00%> (ø)
pkg/consensus/consensus.go	69.18% <0.00%> (+0.62%)	⬆️
pkg/network/server.go	72.76% <0.00%> (+1.05%)	⬆️

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[fyrchik]

Update:

1. Made config compatible with C# node (we can replace single node with a list after Parsing array of string or single string go-yaml/yaml#100 or change C# node directly).
2. Added tests for parsing routines.