Implements Updated Fork Choice Logic Introduced in fusaka

[Kayden-ML]

Describe the feature

Describe the feature

This issue should modify the existing functions listed below

• Modifies is_data_available(): https://ethereum.github.io/consensus-specs/specs/fulu/fork-choice/#modified-is_data_available
• Modifies on_block(): https://ethereum.github.io/consensus-specs/specs/fulu/fork-choice/#modified-on_block

Additional context

No response

[zemse]

Hello, can I give this a shot?

[zemse]

Looks like #1040 must be implemented before this can be done because I don't see DataColumnSidecar and relevant helpers around.

[zemse]

The PR 1063 was merged so this can be closed.