Update Geo admin docs to use new install types terminology

doc/administration/auth/oidc.md

doc/administration/consul.md

doc/administration/geo/disaster_recovery/index.md

...disaster_recovery/runbooks/planned_failover_multi_node.md

...isaster_recovery/runbooks/planned_failover_single_node.md

doc/administration/geo/index.md

doc/administration/geo/replication/configuration.md

doc/administration/geo/replication/disable_geo.md

doc/administration/geo/replication/geo_validation_tests.md

doc/administration/geo/replication/multiple_servers.md

doc/administration/geo/replication/security_review.md

doc/administration/geo/replication/troubleshooting.md

...ministration/geo/replication/version_specific_upgrades.md

doc/administration/geo/secondary_proxy/index.md

doc/administration/geo/setup/database.md

doc/administration/geo/setup/external_database.md

doc/administration/geo/setup/index.md

doc/administration/get_started.md

doc/administration/reference_architectures/index.md

doc/development/service_ping/troubleshooting.md