client: duplicate test utilities

[dajneem23]

This PR starts addressing #4093 by consolidating duplicate test utilities

Description

• deduplicate produceBlockWith4844Tx -> move to helpers.ts with extra params.

This is still a work in progress

[dajneem23]

Hi, I've started my first PR for EthereumJS.
Kindly help me review and comment if any changes are needed

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 83.31%. Comparing base (aa039fd) to head (fa666b9).

Additional details and impacted files

Flag	Coverage Δ
block	84.33% <ø> (ø)
blockchain	89.32% <ø> (ø)
common	97.50% <ø> (ø)
evm	72.77% <ø> (ø)
mpt	90.00% <ø> (+0.56%)	⬆️
statemanager	69.06% <ø> (ø)
static	99.77% <ø> (ø)
tx	89.83% <ø> (?)
util	88.70% <ø> (ø)
vm	55.31% <ø> (ø)

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