Shell scripts are not checked for errors

[kayman-mk]

trafficstars

Describe the solution you'd like

Add shell scripts as sh files to the project and not as tftpl. Analyze them with shellchecker to make sure that they are valid.

The 7.4.0 release failed due to errors in the https://github.com/cattle-ops/terraform-aws-gitlab-runner/blob/main/template/gitlab-runner.tftpl