7549 aggregating pool filter phase0 att in electra

[tbenr]

We don't want to select phase0 attestations when electra enables.

Related to #7965

Documentation

• I thought about documentation and added the doc-change-required label to this PR if updates are required.

Changelog

• I thought about adding a changelog entry, and added one if I deemed necessary.

[rolfyone]

so this is a step forward for sure, now can create blocks in a single node configuration...

in a multi-node minimal setup, aggregates are getting rejected over the wire with messages like:

09:53:46.354 ERROR - Validator   *** Produced invalid aggregate for slot 47: Rejecting aggregate because attester is not in committee. Should have been one of [82, 26, 7, 88]
09:53:46.354 ERROR - Validator   *** Produced invalid aggregate for slot 47: Rejecting aggregate because attester is not in committee. Should have been one of [82, 26, 7, 88]
09:53:46.355 ERROR - Validator   *** Produced invalid aggregate for slot 47: Rejecting aggregate because attester is not in committee. Should have been one of [82, 26, 7, 88]
09:53:46.356 INFO  - Validator   *** Published aggregate          Count: 1, Slot: 47, Root: 133cd269c309cc4aa48f380081ccc43b006b48be26acac14d33bd661ba1b9846

not sure if its my config...

Definitely better than previous where blocks were not being produced even in a single node, but I figured i'd give a bigger statement of progress in case it helps narrow things down...

[rolfyone]

ok so

• 2 nodes on minimal-electra kind of setup is ok up to and including 63 validators, at 64 the aggregator issues start, it might be a committee calculation issue...
• single minimal-electra node with 64 keys does actually show the issue - i had previously used less validators so didn't see it.

[tbenr]

Ye the aggregation during block production is not done yet (currently it is still doing phase0 aggregation which can produce broken blocks)

A PR for this is planned :)