Fix tiny error in test_call_and_callcode_gas_calculation.

[evgenyzdanovich]

🗒️ Description

Fixes the tiny bug in test_call_and_callcode_gas_calculation.

• the test is using the same hardcoded address for CALL and contains exact gas calculation.
• as a result, the calculation was incorrect on subsequent executions (because of empty_account_cost)

The fix is easy - to generate empty address on every test execution to make sure the CALL address is indeed empty.

🔗 Related Issues

✅ Checklist

• All: Set appropriate labels for the changes.
• All: Considered squashing commits to improve commit history.
• All: Added an entry to CHANGELOG.md.
• All: Considered updating the online docs in the ./docs/ directory.
• Tests: All converted JSON/YML tests from ethereum/tests/tests/static have been assigned @ported_from marker.
• Tests: A PR with removal of converted JSON/YML blockchain tests from ethereum/tests have been opened.
• Tests: Included the type and version of evm t8n tool used to locally execute test cases: e.g., ref with commit hash or geth 1.13.1-stable-3f40e65.
• Tests: Ran mkdocs serve locally and verified the auto-generated docs for new tests in the Test Case Reference are correctly formatted.
• Tests: For PRs implementing a missed test case, update the post-mortem document to add an entry the list.

[evgenyzdanovich]

@marioevz PTAL

[evgenyzdanovich]

gentle ping, please?