remove mentions of Edge Server

[MongoCaleb]

Pull Request Info - SDK Docs Consolidation

Jira ticket: https://jira.mongodb.org/browse/DOCSP-43675

Staging Links

index

sdk/dotnet/app-services/connect-to-app-services-backend

sdk/flutter/app-services/connect-to-app

sdk/kotlin/app-services/connect-to-app-services-backend

sdk/kotlin/realm-database/crud/read

sdk/kotlin/realm-database/open-and-close-a-realm

sdk/node/app-services/connect-to-app-services-backend

sdk/node/model-data/data-types/counters

sdk/react-native/app-services/connect-to-app-services-app

sdk/swift/app-services/connect-to-app-services-backend

sdk/swift/realm-files

studio/view-atlas-data-sync