Use accurate refund counter

[mattsse]

as described here

paradigmxyz/reth#14783

we're incorrectly tracking refunds because revm's refund function returns the refund per call which can go negative.

but we want the total refund counter.

to fix this we need to change the type to an i64 because this can go negative:

revm-inspectors/src/tracing/types.rs

Lines 674 to 675 in c847b12

	/// Gas refund counter before step execution
	pub gas_refund_counter: u64,

and move this

revm-inspectors/src/tracing/mod.rs

Line 445 in c847b12

gas_refund_counter: interp.gas.refunded() as u64,

to the step_end function, here:

revm-inspectors/src/tracing/mod.rs

Line 519 in c847b12

step.gas_cost = step.gas_remaining.saturating_sub(interp.gas.remaining());

this now only tracks the refund snapshot on call level, so what we need to do on call_end is to compute the total refund counter by looking at the previous calls

revm-inspectors/src/tracing/mod.rs

Line 341 in c847b12

fn fill_trace_on_call_end<DB: Database>(

and compute the real refund counters

[paronikyanarmen]

Will work on this