* devnet/e2e: run L1 Deneb and L2 Fjord by default

* op-e2e: fix TestPostUnsafePayload

* op-e2e: Fix TestGasPriceOracleFeeUpdates

* op-e2e/actions: fix some tests

The L2EngineAPI test needs more fixing

* tests: fixes to support Ecotone/Fjord in more tests

* op-e2e: one more fix

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Co-authored-by: Sebastian Stammler <seb@oplabs.co>