GitLab

refs DE-670

For the EKS transition, we need to ensure that the Linters stage doesn’t run on the EC2 builder node and instead properly uses EKS containers. To do this, the Linters stage needs to not depend on having the .git directory on the host machine.

Test Plan
1. Linters properly reports to the correct gerrit for main builds
2. Linters properly reports to the correct gerrit for plugin builds
3. Linters does not become the runtime bottleneck
4. Linters yarn.lock diff check works

Change-Id: I49650bfb3feece9614a667d3af5ec9dba8c2e838
Reviewed-on: https://gerrit.instructure.com/c/canvas-lms/+/264539

Reviewed-by: Kyle Rosenbaum <krosenbaum@instructure.com>
Tested-by: Service Cloud Jenkins <svc.cloudjenkins@instructure.com>
QA-Review: Aaron Ogata <aogata@instructure.com>
Product-Review: Aaron Ogata <aogata@instructure.com>