Use consistent naming in runner GraphQL queries

Our SRE team uses query names to diagnose problems using query operation names (e.g. gitlab-com/gl-infra/production#7437 (comment 1026709445)).

Some of the runner query names could be updated to stay consistent with each other, for example:

  • admin_runners.graphql contains a query called getRunners, when it could be getAdminRunners.
Edited by Miguel Rincon