Define duty due time in bps instead of fraction of `SECONDS_PER_SLOT`

[ensi321]

Problem description

From berlinterop there has been support to replacing INTERVALS_PER_SLOT with constants in milliseconds for duties' due time (attestation, aggregation, sync committee, ePBS's PTC etc.). Update: we are going to express duty due times in bps instead.

We need to refactor our codebase to more aligned with changes in ethereum/consensus-specs#3510 ethereum/consensus-specs#4476

Solution description

Refactor our codebase so we don't define duties in fractions of SECONDS_PER_SLOT

Additional context

No response

[ensi321]

For now, the consensus is we ship this in glamsterdam. However we can implement this any time pre-glamsterdam since it does not introduce any functional change.