Adds chmod for execution of sh file

What does this MR do and why?

Adds bash to test script

Example project: https://gitlab.com/gitlab-org/ci-sample-projects/cicd-templates/cplusplus.gitlab-ci.yml-test-project/-/tree/main/

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.