Update InstanceGroup and Add Build Runner in MAKEFILE

[neevnuv]

This PR is a bundle of small changes that fixes the usage of InstanceGroup CR and separates instancegroups and container groups in the UI and description.

Changes:

• Rename policy_spec_override to pod_spec_override to allign with the awx collection. Plus, after looking into the code of the runner, the environment variable of POLICY_SPEC_OVERRIDE was never used.
• Added variables for max_concurrent_jobs and max_forks in CSV and CRD of instanceGroup.
• Remove the credential from required. This is due to the credential only being needed for credentialGroups and not for instanceGroups.
• Adjusted the CSV to show InstanceGroup variables when is_credential_group is false and show ContainerGroup variables when is_credential_group is true
• Added in make file a small part to allow building the runner image. In the future should add an option to specify the runner image in the deploy. Plus added a line about this in the documentation.
• Moved the instance group samlpes in a directory for instancegroups. Then added a CR that deploys a ContainerGroup and another that deploy an InstanceGroup.
• Added ifs to the job definition template of the instance group to not require all the variables to be specified.

This was opened to solve #161

[neevnuv]

Thanks for running the pipelines. I see changing the samples file location failed the pipeline, I'll fix it.

[neevnuv]

hi @rooftopcellist, I think the PR is ready. I would love it if you would go over it and merge it 😁