Incorrect base fee usage in tracing tests

[palango]

While working on another issue, I found that in the tracing tests the base fee is generally set to nil (see https://github.com/ethereum/go-ethereum/blob/master/eth/tracers/internal/tracetest/prestate_test.go#L120). Changing this to pass the proper base fee works for most tests, but TestPrestateWithDiffModeTracer runs into problems in the create_failed.json test case.

Here the base fee is 51088069741, and the transactions fee limit is set to 112855938170. The transactions tip cap is 1500000000. This leads to a gas price of 112855938170 when the base fee is not set, but 52588069741 when the base fee is set.