chore: management console naming inconsistency (#11390)

# Which Problems Are Solved

The following terms have all been renamed to management console:

- Customer Portal (when used to mean the console)
- Console
- Admin Console

# How the Problems Are Solved

- Search & Replace smartly
- Use Copilot for translation files

Changes done to: backend + frontend codebase, docs, translations and
protobufs (descriptions only)

# Additional Context

- Partially Closes #11279

internal/query/instance_features.go

@@ -18,7 +18,7 @@ type InstanceFeatures struct {
 	EnableBackChannelLogout        FeatureSource[bool]
 	LoginV2                        FeatureSource[*feature.LoginV2]
 	PermissionCheckV2              FeatureSource[bool]
-	ConsoleUseV2UserApi            FeatureSource[bool]
+	ManagementConsoleUseV2UserApi  FeatureSource[bool]
 	EnableRelationalTables         FeatureSource[bool]
 }