*: fix inclusion aggregation bits for Electra

[KaloyanTanev]

Previously we have had aggregation bits of a single committee per attestation in the block. An example can be seen here - each attestation object has one single committee index.

In Electra, however, one single attestation object contains aggregation bits from multiple committees. this can be seen here. The aggregation bits object is a concatenation of all the committees participated in this attestation object.

This creates some issues in our inclusion checker. What we have been doing so far is to go over each attestation object and "merge" the attestations with the same hash root. Note that previously the committee index was part of the signed data, hence we had different hash root for each attestation object with different committee. Now the committee index is out of the signed data, hence signatures of the same data from committee X and X+1 is with the same hash root. That said, what we need to do now is for each attestation object:

• check aggregation bits of which committees it includes
• check check the size of each committee (as we need to split the big aggregation bits object into aggregation bits for committee)
• conjugate (do the Or operation) to the aggregation bits for this committee only

category: feature
ticket: none

[codecov]

Codecov Report

Attention: Patch coverage is 33.33333% with 168 lines in your changes missing coverage. Please review.

Please upload report for BASE (electra@fffdc56). Learn more about missing BASE report.

Files with missing lines	Patch %	Lines
core/tracker/inclusion.go	55.97%	41 Missing and 18 partials ⚠️
eth2util/statecomm/statecomm.go	0.00%	55 Missing ⚠️
app/eth2wrap/httpwrap.go	20.45%	33 Missing and 2 partials ⚠️
app/eth2wrap/multi.go	0.00%	13 Missing ⚠️
app/eth2wrap/lazy.go	0.00%	6 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             electra    #3501   +/-   ##
==========================================
  Coverage           ?   57.51%           
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  Files              ?      218           
  Lines              ?    33698           
  Branches           ?        0           
==========================================
  Hits               ?    19380           
  Misses             ?    12277           
  Partials           ?     2041           

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[sonarqubecloud]

Quality Gate passed

Issues
10 New issues
0 Accepted issues

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

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