Add caching layer to metrics (#17617)

app/lib/admin/metrics/dimension/base_dimension.rb

app/lib/admin/metrics/dimension/languages_dimension.rb

app/lib/admin/metrics/dimension/servers_dimension.rb

...ib/admin/metrics/dimension/software_versions_dimension.rb

app/lib/admin/metrics/dimension/sources_dimension.rb

app/lib/admin/metrics/dimension/space_usage_dimension.rb

app/lib/admin/metrics/dimension/tag_languages_dimension.rb

app/lib/admin/metrics/dimension/tag_servers_dimension.rb

app/lib/admin/metrics/measure/active_users_measure.rb

app/lib/admin/metrics/measure/base_measure.rb

app/lib/admin/metrics/measure/interactions_measure.rb

app/lib/admin/metrics/measure/new_users_measure.rb

app/lib/admin/metrics/measure/opened_reports_measure.rb

app/lib/admin/metrics/measure/resolved_reports_measure.rb

app/lib/admin/metrics/measure/tag_accounts_measure.rb

app/lib/admin/metrics/measure/tag_servers_measure.rb

app/lib/admin/metrics/measure/tag_uses_measure.rb

app/lib/admin/metrics/retention.rb