Add support for --template-config CLI option
Add support for the --template-config
CLI options: https://docs.gitlab.com/runner/register/#runners-configuration-template-file
The documentation suggests that this CLI option would be useful to solve many problems in a Helm chart installation of Gitlab, yet until now the option was not supported by the Helm chart.
As just one example this allows a solution to this issue which will survive pod restarts and installation upgrades: gitlab-org/gitlab-foss#47283 (comment 164716469)
Also relates to: gitlab-org/gitlab-runner#4129 (closed)