Truncate command output when debugging

What does this MR do?

This MR applied the fix drafted in !77 (closed) to address the issue described in gitlab-org/gitlab#339031 (closed).

Specifically it truncates the log output for messages that exceed 1000 characters to keep the total output manageable for debugging purposes.

What are the relevant issue numbers?

Does this MR meet the acceptance criteria?

• Changelog entry added
• Documentation created/updated for GitLab EE, if necessary
• Documentation created/updated for this project, if necessary
• Documentation reviewed by technical writer or follow-up review issue created
• Tests added for this feature/bug
• Job definition updated, if necessary
  • Job definition example
  • CI Templates (to be removed)
  • Vendored CI Templates (also in CE)
  • Ensure that all of the ENV vars supported are propagated to Docker containers upon docker run in job definitions
• Conforms to the code review guidelines
• Security reports checked/validated by reviewer