cli: add filebytes parameter type

[AnnaShaleva]

Close #1752.

[codecov]

Codecov Report

Merging #1762 (db73d6a) into master (fe918e2) will increase coverage by 0.06%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #1762      +/-   ##
==========================================
+ Coverage   82.61%   82.67%   +0.06%     
==========================================
  Files         271      271              
  Lines       22140    22149       +9     
==========================================
+ Hits        18290    18311      +21     
+ Misses       2725     2713      -12     
  Partials     1125     1125              

Impacted Files	Coverage Δ
cli/smartcontract/smart_contract.go	87.84% <100.00%> (+0.04%)	⬆️
pkg/smartcontract/param_type.go	97.40% <100.00%> (+0.10%)	⬆️
pkg/smartcontract/parameter.go	80.76% <100.00%> (+0.06%)	⬆️
pkg/core/interop/json/json.go	100.00% <0.00%> (+100.00%)	⬆️

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