Change the resource id param for IMDS (#5238)

Author: neha-bhargava

src/client/Microsoft.Identity.Client/Internal/Constants.cs

@@ -45,6 +45,7 @@ internal static class Constants
         public const string ManagedIdentityClientId2017 = "clientid";
         public const string ManagedIdentityObjectId = "object_id";
         public const string ManagedIdentityResourceId = "mi_res_id";
+        public const string ManagedIdentityResourceIdImds = "msi_res_id";
         public const string ManagedIdentityDefaultClientId = "system_assigned_managed_identity";
         public const string ManagedIdentityDefaultTenant = "managed_identity";
         public const string CiamAuthorityHostSuffix = ".ciamlogin.com";

src/client/Microsoft.Identity.Client/ManagedIdentity/ImdsManagedIdentitySource.cs

@@ -73,7 +73,7 @@ protected override ManagedIdentityRequest CreateRequest(string resource)
 
                 case AppConfig.ManagedIdentityIdType.ResourceId:
                     _requestContext.Logger.Info("[Managed Identity] Adding user assigned resource id to the request.");
-                    request.QueryParameters[Constants.ManagedIdentityResourceId] = _requestContext.ServiceBundle.Config.ManagedIdentityId.UserAssignedId;
+                    request.QueryParameters[Constants.ManagedIdentityResourceIdImds] = _requestContext.ServiceBundle.Config.ManagedIdentityId.UserAssignedId;
                     break;
 
                 case AppConfig.ManagedIdentityIdType.ObjectId:

tests/Microsoft.Identity.Test.Common/Core/Mocks/MockHttpManagerExtensions.cs

@@ -392,7 +392,10 @@ public static void AddManagedIdentityMockHandler(
 
             if (userAssignedIdentityId == UserAssignedIdentityId.ResourceId)
             {
-                httpMessageHandler.ExpectedQueryParams.Add(Constants.ManagedIdentityResourceId, userAssignedId);
+                httpMessageHandler.ExpectedQueryParams.Add(
+                    managedIdentitySourceType == ManagedIdentitySource.Imds ? 
+                        Constants.ManagedIdentityResourceIdImds : Constants.ManagedIdentityResourceId, 
+                    userAssignedId);
             }
 
             if (userAssignedIdentityId == UserAssignedIdentityId.ObjectId)