refactor(abci): Pass context to TxSelector

[itsdevbear]

Description

Closes: #XXXX

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[itsdevbear]

wait actually are we down to pass the req ptr as well?

[julienrbrt]

wait actually are we down to pass the req ptr as well?

Sounds dangerous to be able to change the request within the txSelector imho.

[itsdevbear]

For context what i'm trying to do is build an Ethereum header in the TxSelector, so knowing the proposer is needed.