Validate ARM processors perform as expected in GitLab deployments for Reference Architecture guidance

ARM processors are becoming more available on the main Cloud Providers. AWS has been in this space for some time and GCP started a little while after.

ARM processors can come with some benefits in that they tend to be cheaper but offer more power. As such this task is to validated that GitLab can be deployed on ARM processors and that it performs in line with expectations - Either equally or better than the equivalent X86 counterparts so that we in turn can add guidance to the Reference Architectures that these are supported types for customers who want to use them.