fix(metrics-onboarding) Add aspnet onboarding (#72681)

Add metrics onboarding for the platform `aspnet`

static/app/data/platformCategories.tsx

@@ -463,6 +463,7 @@ const customMetricBackendPlatforms: readonly PlatformKey[] = [
   'dart',
   'deno',
   'dotnet',
+  'dotnet-aspnet',
   'dotnet-aspnetcore',
   'dotnet-awslambda',
   'dotnet-gcpfunctions',

static/app/gettingStartedDocs/dotnet/aspnet.tsx

@@ -14,6 +14,7 @@ import {
   getCrashReportModalIntroduction,
   getCrashReportSDKInstallFirstStep,
 } from 'sentry/components/onboarding/gettingStartedDoc/utils/feedbackOnboarding';
+import {getDotnetMetricsOnboarding} from 'sentry/components/onboarding/gettingStartedDoc/utils/metricsOnboarding';
 import replayOnboardingJsLoader from 'sentry/gettingStartedDocs/javascript/jsLoader/jsLoader';
 import {t, tct} from 'sentry/locale';
 import {getPackageVersion} from 'sentry/utils/gettingStartedDocs/getPackageVersion';
@@ -226,6 +227,7 @@ const crashReportOnboarding: OnboardingConfig = {
 const docs: Docs = {
   onboarding,
   replayOnboardingJsLoader,
+  customMetricsOnboarding: getDotnetMetricsOnboarding({packageName: 'Sentry.AspNet'}),
   crashReportOnboarding,
 };