Handle a case where priorityFee > maxFee in the task loop

[thomaspanf]

Automatic transactions in the task loop fail when the user-inputted priorityFee is greater than the oracle based maxFee. This PR addresses this case by setting priorityFee to min(priorityFee, 25% of the oracle based maxFee) when priorityFee > maxFee for transactions in the node task loop.

For example: automatically initializing vote power, defending pDAO proposals, bond reductions and so on.

The change is also applied to watchtower task process-penalties.go

[jshufro]

This is fine but we can do better.

Every t *taskThing has a maxPriorityFee setting. Instead, let's make every t *taskThing have a gasSettings *GasSettings field. Put maxPriorityFee on GasSettings, get rid of GetPriorityFee and instead have a function called something like func (g *GasSettings) ApplyTo(opts *bind.CallOpts) which sets opts.GasFeeCap, opts.GasTipCap, and opts.GasLimit.

Then we get a lot of deduplication out of this PR. Also, add a unit test? it's all arithmetic and logic that is very easy to unit test.

[jshufro]

Suggested change

	} else {
	return quarterMaxFee
	}
	return quarterMaxFee

[jshufro]

Edit: just realized this is on v1. Fine to merge as-is I guess, but make sure we do this right when we apply it to v2