Merge getPayloadV3 and getBlobsBundleV1 (part 1)

[StefanBratanov]

PR Description

Spec Reference: ethereum/execution-apis#402

• Remove getBlobsBundleV1 method in ExecutionEngineClient and ExecutionLayerChannel
• Changed BlobsBundleV1 jackson object to match the structure in the spec
• Modified the internal BlobsBundle

Left for part 2:

• Return BlobsBundle alongside the ExecutionPayload in the ExecutionLayerChannel and the ExecutionClientHandler
• Fix couple of TODOs
• Modify the ExecutionLayerBlockProductionManagerImpl to not use the BLOBS_BUNDLE_DUMMY
• Modify the ExecutionLayerChannelStub

Fixed Issue(s)

will fix task in #6822 when part 2 is complete

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.

[tbenr]

LGTM

[tbenr]

I'd track the fact that we want the Stub to work properly. Maybe part of part2 or on a separate PR

[StefanBratanov]

I'd track the fact that we want the Stub to work properly. Maybe part of part2 or on a separate PR

Good point. Added it as a point here. And will tackle in the second part.