feat: params estimator for delegate action

[jakmeier]

The main cost of a meta transaction is for all the inner action costs.
The send costs for them are paid twice, which covers all the extra checks.

However, there is also a bit of constant overhead for each delegate action.
One very small bit when sending it, a slightly larger bit when executing it.

This adds the estimation code for this to the parameter estimator.

Note: All estimations were run on top of the changes from #8578
because that actually changes the signature verification, which happens
to be 99% of the cost we measure here.

[jakmeier]

Keeping it as a draft for now, since the results are still quite unstable / high-variance. I'd like to improve on that, but OTOH we already get useful numbers from this implementation and can basically move ahead with meta transaction stabilization.

For estimation results, see this comment in the meta tx gas cost estimation issue: #8114 (comment)

[akhi3030]

I think this is not being actively worked on.