resolve #9112 and #9102

(cherry picked from commit 83adc457f3a5bd5c24648a5a3ed4c386ea873cff)

framework/src/Volo.Abp.Http.Client.IdentityModel/Volo/Abp/Http/Client/IdentityModel/IdentityModelRemoteServiceHttpClientAuthenticator.cs

@@ -20,7 +20,7 @@ namespace Volo.Abp.Http.Client.IdentityModel
         {
             await IdentityModelAuthenticationService.TryAuthenticateAsync(
                 context.Client,
-                context.RemoteService.GetIdentityClient()
+                context.RemoteService.GetIdentityClient() ?? context.RemoteServiceName
             );
         }
     }

framework/src/Volo.Abp.IdentityModel/Volo/Abp/IdentityModel/IdentityModelTokenCacheItem.cs

@@ -5,7 +5,6 @@ using Volo.Abp.MultiTenancy;
 namespace Volo.Abp.IdentityModel
 {
     [Serializable]
-    [IgnoreMultiTenancy]
     public class IdentityModelTokenCacheItem
     {
         public string AccessToken { get; set; }