Add new groups to Renovate configuration (#5381)

* Add .NET group to Renovate configuration

Added a new group for .NET related dependencies in Renovate configuration.

* Match with regular expressions

Updated package name matching patterns for .NET

* Add IdentityModel group to Renovate configuration

Added a new group for IdentityModel packages in Renovate configuration.

* Tweaks

* Add OpenTelemetry group

---------

Co-authored-by: Brandon Ording <bording@gmail.com>

Author: tamararivera

.github/renovate.json5

@@ -1,5 +1,37 @@
 {
+  $schema: "https://docs.renovatebot.com/renovate-schema.json",
   packageRules: [
+    {
+      description:"Packages that ship as part of .NET",
+      matchDatasources: ["nuget"],
+      matchPackageNames: [
+        "/^Microsoft.AspNetCore./",
+        "/^Microsoft.Extensions./",
+        "/^System./",
+        "!/^System.IdentityModel./",
+        "!/^System.Management.Automation/",
+        "!/^System.Reactive/"
+      ],
+      groupName: ".NET Packages",
+      groupSlug: "dotnet-packages"
+    },
+    {
+      description:"IdentityModel packages that release separately from .NET",
+      matchDatasources: ["nuget"],
+      matchPackageNames: [
+        "/^Microsoft.IdentityModel./",
+        "/^System.IdentityModel./"
+      ],
+      groupName: "IdentityModel",
+      groupSlug: "identity-model"
+    },
+    {
+      description:"OpenTelemetry packages",
+      matchDatasources: ["nuget"],
+      matchPackageNames: ["/^OpenTelemetry./"],
+      groupName: "OpenTelemetry",
+      groupSlug: "open-telemetry"
+    },
     {
       description: "Keep ServiceControl.Management.PowerShell on 8.x",
       matchFileNames: ["**/ServiceControl.Management.PowerShell.csproj"],