Since we are planning to release pmm-server for ARM architecture, we need to add support for arm in our staging/testing job.

Jenkins job link: https://pmm.cd.percona.com/blue/organizations/jenkins/pmm3-aws-staging-start/activity

AC:

• Job can run on ARM Runner

• PMM Server Arm can start.

• Select field to be able to select between ARM64 and AMD64