fix: restore timeout_sec

[SakodaShintaro]

Description

Currently, AWSIM publishes only the top lidar data. As a result, the concatenate node waits for the left and right lidar data until it reaches the timeout.

In a previous change (#22), the timeout_sec argument was removed, which changed the actual value of timeout_sec from 0.01 to 0.033. This has caused performance degradation in autoware_ekf_localizer due to slower lidar data publishing.

This pull request addresses the issue by restoring the appropriate timeout setting.

Pre-review checklist for the PR author

The PR author must check the checkboxes below when creating the PR.

• I've confirmed the contribution guidelines.
• The PR follows the pull request guidelines.

In-review checklist for the PR reviewers

The PR reviewers must check the checkboxes below before approval.

• The PR follows the pull request guidelines.

Post-review checklist for the PR author

The PR author must check the checkboxes below before merging.

• There are no open discussions or they are tracked via tickets.

After all checkboxes are checked, anyone who has write access can merge the PR.