fix: upsert all config mock (#78)

Author: aaron-steinfeld

config-service-api/src/testFixtures/java/org/hypertrace/config/service/test/MockGenericConfigService.java

@@ -271,7 +271,7 @@ public MockGenericConfigService mockUpsertAll() {
               return null;
             })
         .when(this.mockConfigService)
-        .upsertConfig(ArgumentMatchers.any(), ArgumentMatchers.any());
+        .upsertAllConfigs(ArgumentMatchers.any(), ArgumentMatchers.any());
 
     return this;
   }