core: integrating go-eth2-client for for v3 endpoint

[pinebit]

Integrated the forked version of go-eth2-client that supporting UniversalProposal interface.

The changes for go-eth2-client can be found here: attestantio/go-eth2-client#109

category: feature
ticket: #2749

[codecov]

Codecov Report

Attention: Patch coverage is 55.18672% with 108 lines in your changes are missing coverage. Please review.

Project coverage is 53.65%. Comparing base (314d11f) to head (f568d72).

Files	Patch %	Lines
core/dutydb/memory.go	74.41%	16 Missing and 6 partials ⚠️
core/fetcher/fetcher.go	65.57%	14 Missing and 7 partials ⚠️
core/unsigneddata.go	52.27%	15 Missing and 6 partials ⚠️
app/eth2wrap/eth2wrap_gen.go	0.00%	19 Missing ⚠️
testutil/beaconmock/options.go	0.00%	13 Missing ⚠️
testutil/beaconmock/beaconmock.go	0.00%	6 Missing ⚠️
testutil/beaconmock/beaconmock_fuzz.go	0.00%	6 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff            @@
##             main    #2913    +/-   ##
========================================
  Coverage   53.65%   53.65%            
========================================
  Files         200      200            
  Lines       28229    28431   +202     
========================================
+ Hits        15146    15255   +109     
- Misses      11214    11283    +69     
- Partials     1869     1893    +24     

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[sonarcloud]

Quality Gate passed

Issues
2 New issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
2.1% Duplication on New Code

See analysis details on SonarCloud