Fixes:
* Change Mev boost Builder metrics flags. Using `--metrics.builder=true`
cause this flag to be considered as `false` and making builder metrics
to not being recorded.
* Fix early return on
https://github.com/kurtosis-tech/ethereum-package/blob/main/main.star#L236-L242
causing the execution to finish before adding the additional services.

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Co-authored-by: Gyanendra Mishra <anomaly.the@gmail.com>