* refactor(l2geth): rename L1GasPrice to DataPrice

* feat(l2geth/rollup-gpo): allow execution price to be specified

* feat(l2geth/api): use the execution price instead of the historical gasprice

* feat(l2geth): allow configuring the l2 execution price

* fix(integration-tests): adjust gas costs to match 0-execution price

* fix(integration-tests): pin down l1 gas estimation costs to the expected values

* chore: add changeset

* fix(sync-service): adjust tests for the refactor

* feat(rollup-gasprice): make Rollup GPO methods thread safe