gomod: upgrade yaml package from v2 to v3

[AnnaShaleva]

Close #2085.

[AnnaShaleva]

Indentation issue is still there, but closed unmerged due to the lack of activity. We can create our own fork with fix, but I'm not sure whether we need one more dependant fork. The issue is not critical, IMO.

[roman-khimov]

we need one more dependant fork

No. We use it for various configuration files, if they're compatible with v3 we're fine.

[codecov]

Codecov Report

Merging #2527 (ec21c14) into master (e8a876a) will increase coverage by 0.09%.
The diff coverage is 95.52%.

@@            Coverage Diff             @@
##           master    #2527      +/-   ##
==========================================
+ Coverage   85.03%   85.12%   +0.09%     
==========================================
  Files         294      294              
  Lines       37028    37078      +50     
==========================================
+ Hits        31485    31563      +78     
+ Misses       4223     4190      -33     
- Partials     1320     1325       +5     

Impacted Files	Coverage Δ
cli/smartcontract/generate.go	83.33% <ø> (ø)
cli/smartcontract/smart_contract.go	92.53% <ø> (ø)
pkg/compiler/compiler.go	74.60% <ø> (ø)
pkg/config/config.go	82.35% <ø> (ø)
cli/smartcontract/permission.go	91.20% <81.25%> (-3.11%)	⬇️
pkg/core/native/native_neo.go	81.81% <100.00%> (+1.46%)	⬆️
pkg/network/compress.go	64.00% <0.00%> (-12.00%)	⬇️
pkg/network/message.go	94.02% <0.00%> (-2.24%)	⬇️
pkg/services/oracle/request.go	63.01% <0.00%> (+5.02%)	⬆️
... and 2 more

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