*: electra versioned attestations

[KaloyanTanev]

First PR with Electra updates from the go-eth2-client's electra branch. It includes:

• Refactoring the Attestation object to VersionedAttestation. Similarly to the proposals and blocks, attestations are versioned now, as there are some changes in their structure for Electra. Most functions take as arguments versioned instead of regular attestations now. The same logic for unfolding a versioned attestations is applied as it is for the blocks.
• Adding a new BlockAttestationsV2 endpoint, as per the new Beacon API for Electra. Note that this endpoint is one of the few that is not supported by go-eth2-client, so we include it in our wrapper and implement it ourselves.
• Add electra as a version in most switch/case statements for already existing versioned structures (blocks, signed blocks, etc.). The list is not exhaustive though and I haven't checked yet in full if electra is included everywhere. More on that in later PRs, I have focused only on making the current test cases pass.
• Changes of golden files was required, as the fuzzer that we use for random generation of a structure is generating a different random now, as some structures are different (i.e.: the VersionedBlock structure now also has electra in it). This results in different results for the test, hence the different golden files for testing.
• Skipping Gnosis fixes and tests. As we are using our own forked version of go-eth2-client for Gnosis, it seemed unfeasible to me to update our fork every time go-eth2-client push new commit to their electra branch and we adapt the new changes. That said, I've commented out the gnosis tests and the go.mod replacement.

category: feature
ticket: none

[codecov]

Codecov Report

Attention: Patch coverage is 36.17607% with 464 lines in your changes missing coverage. Please review.

Please upload report for BASE (electra@8a7a42e). Learn more about missing BASE report.

Files with missing lines	Patch %	Lines
core/signeddata.go	28.97%	139 Missing and 13 partials ⚠️
core/tracker/inclusion.go	19.33%	108 Missing and 13 partials ⚠️
app/eth2wrap/httpwrap.go	22.01%	77 Missing and 8 partials ⚠️
core/ssz.go	64.42%	39 Missing and 14 partials ⚠️
core/unsigneddata.go	26.92%	15 Missing and 4 partials ⚠️
core/validatorapi/validatorapi.go	44.00%	10 Missing and 4 partials ⚠️
app/eth2wrap/eth2wrap_gen.go	0.00%	5 Missing ⚠️
eth2util/types.go	0.00%	4 Missing ⚠️
app/eth2wrap/lazy.go	50.00%	2 Missing and 1 partial ⚠️
app/eth2wrap/multi.go	86.95%	3 Missing ⚠️
... and 2 more

Additional details and impacted files

@@            Coverage Diff             @@
##             electra    #3473   +/-   ##
==========================================
  Coverage           ?   56.45%           
==========================================
  Files              ?      218           
  Lines              ?    33088           
  Branches           ?        0           
==========================================
  Hits               ?    18680           
  Misses             ?    12465           
  Partials           ?     1943           

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[KaloyanTanev]

The integration tests are failing because of yet unimplemented v2 endpoints, however, this PR grew beyond what is normal amount of work to be done in one PR, so I'd put those new v2 endpoints in a separate one...

[pinebit]

Quickly skimmed, did not find any red flags. Implementation looks very accurate.

[pinebit]

Quickly skimmed, did not find any red flags. Implementation looks very accurate.

[sonarqubecloud]

Quality Gate passed

Issues
13 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud