EVM Watcher: Fix shadowed variable in Optimism case #10231

Job	Run time
algorand	13m 2s
ethereum-upgrade	14m 59s
ethereum	13m 25s
node	4m 40s
solana	3m 49s
Aptos	4m 4s
cosmwasm	2m 41s
sdk_vaa	1m 53s
Sui	2m 23s
cli	2m 50s
terra-2	11m 14s
terra	12m 29s
wormchain	6m 40s
docker	6s
npm-packages	5s
prettier	19s
rust-lint-and-tests (cosmwasm/Cargo.toml)	4m 42s
rust-lint-and-tests (terra/Cargo.toml)	2m 30s
rust-lint-and-tests (sdk/rust/Cargo.toml)	51s
tilt	16m 9s
node-lint	22s
node-tests	17s
	1h 59m 30s

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