feat(MM-61865): Add mobile client content load network metrics (#29601)

* MM-61865: Add mobile client content load network metrics

* added new common label

* renaming from MobileClientContentLoad to MobileClientNetworkRequests
* content_load_group => network_request_group

* refactor more NetworkRequest-* changes

* replace contentLoadGroup to networkRequestGroup

* new metrics elapsedTime

* Refactor urlCount to totalRequests

* add averageSpeed metric
* replace contentLoadGroup with networkRequestGroup
* use h.Labels vs commonLabels for network_request_group

* add agent

* add effective latency metrics

* add total parallel requests & total sequential

* mocks generated by mockery

* did a bit of cleanup and sorting

* formatting

* updated the AcceptedNetworkRequestGroups

* cleanup and sorting

server/einterfaces/metrics.go

@@ -121,6 +121,15 @@ type MetricsInterface interface {
 	ObserveMobileClientLoadDuration(platform string, elapsed float64)
 	ObserveMobileClientChannelSwitchDuration(platform string, elapsed float64)
 	ObserveMobileClientTeamSwitchDuration(platform string, elapsed float64)
+	ObserveMobileClientNetworkRequestsAverageSpeed(platform, agent, networkRequestGroup string, speed float64)
+	ObserveMobileClientNetworkRequestsEffectiveLatency(platform, agent, networkRequestGroup string, latency float64)
+	ObserveMobileClientNetworkRequestsElapsedTime(platform, agent, networkRequestGroup string, elapsedTime float64)
+	ObserveMobileClientNetworkRequestsLatency(platform, agent, networkRequestGroup string, latency float64)
+	ObserveMobileClientNetworkRequestsTotalCompressedSize(platform, agent, networkRequestGroup string, size float64)
+	ObserveMobileClientNetworkRequestsTotalParallelRequests(platform, agent, networkRequestGroup string, count float64)
+	ObserveMobileClientNetworkRequestsTotalRequests(platform, agent, networkRequestGroup string, count float64)
+	ObserveMobileClientNetworkRequestsTotalSequentialRequests(platform, agent, networkRequestGroup string, count float64)
+	ObserveMobileClientNetworkRequestsTotalSize(platform, agent, networkRequestGroup string, size float64)
 	ClearMobileClientSessionMetadata()
 	ObserveMobileClientSessionMetadata(version string, platform string, value float64, notificationDisabled string)
 	ObserveDesktopCpuUsage(platform, version, process string, usage float64)