[Gloas] Store full expected withdrawals in BeaconState + spec alignment

[StefanBratanov]

PR Description

Disabling reference tests for Gloas, since there would be too many changes upcoming in the next release.

Main change:
ethereum/consensus-specs#4745
Refactor of withdrawals:
ethereum/consensus-specs#4765
ethereum/consensus-specs#4766
Other small changes:
ethereum/consensus-specs#4775
ethereum/consensus-specs#4797
ethereum/consensus-specs#4774
ethereum/consensus-specs#4753

Fixed Issue(s)

N/A

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.

---

Note

Aligns Gloas with updated consensus specs by persisting full expected withdrawals and validating payloads against them.

• Replace latest_withdrawals_root with payload_expected_withdrawals across state, schemas, REST schema, builders, and upgrade path
• Refactor withdrawals flow: compute/track expected withdrawals (builder, partials, validator sweep), apply to state, update next indices, and compare payload withdrawals to expected list; add helpers like getTotalWithdrawn
• Update execution processing to verify envelope withdrawals match payload_expected_withdrawals; cache and update related builder payment/withdrawal queues
• Type/logic cleanups: use UInt64 validator indices in Electra pending withdrawals paths; fix equality checks, quorum >=, attestation indexing API, and various helpers
• Spec constants: change Gloas BEACON_BUILDER domain to 0x0B000000
• Testing: adjust expected signatures/APIs; temporarily skip some Gloas reference tests (SSZ, pyspec fork_choice)
• Minor validator/util predicates and exit rules tweaks (e.g., pending withdrawal checks in exits)

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[StefanBratanov]

Need to wait for reference tests release, then can merge

[zilm13]

LGTM, just few nits