Restore compose warning test compile after naming simplification

[cristianrgreco]

Summary of changes

• Replace a stale composeContainerName("container") reference in the compose warning test with the v2 container name "container-1".
• Remove the compile regression on main where packages/testcontainers failed with TS2304: Cannot find name 'composeContainerName'.

Verification commands run

• npm run format
• npm run lint
• npm run test -- packages/testcontainers/src/docker-compose-environment/docker-compose-environment.test.ts -t "should warn when no started containers match configured wait strategy names"
• npm run build --ignore-scripts --workspace packages/testcontainers -- --project tsconfig.json

Test results summary

• Format and lint completed cleanly.
• Targeted compose warning test passed.
• packages/testcontainers compile check passed.

Non-breaking evidence

• Change is test-only and replaces one unresolved identifier with a concrete container name.
• No runtime/package code paths or public API exports were changed.

Closes #1238

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