Hosting.KeyCloak: Remove incorrect param check on WithRealmImport

The import path is expected to be relative to the AppHost path, but here
it was being used as-is - relative to the current working directory.
Instead, remove the check and let the downstream `WithBindMount` method
use the path correctly.

This manifested as a failure to import the file when running the app
with `Aspire.Hosting.Testing` which would start the apphost with
cwd!=apphost .

Author: radical

src/Aspire.Hosting.Keycloak/KeycloakResourceBuilderExtensions.cs

@@ -138,13 +138,7 @@ public static IResourceBuilder<KeycloakResource> WithRealmImport(
     {
         ArgumentNullException.ThrowIfNull(importDirectory);
 
-        if (!Directory.Exists(importDirectory))
-        {
-            throw new DirectoryNotFoundException($"The realm import directory {importDirectory} does not exist.");
-        }
-
         builder.WithBindMount(importDirectory, RealmImportDirectory, isReadOnly);
-
         return builder;
     }
 }

tests/TestingAppHost1/TestingAppHost1.AppHost/Program.cs

@@ -6,10 +6,14 @@
 var builder = DistributedApplication.CreateBuilder(args);
 
 builder.AddRedis("redis1");
+var keycloak = builder.AddKeycloak("keycloak", 8080)
+                      .WithDataVolume()
+                      .WithRealmImport("../realms");
 builder.AddProject<Projects.TestingAppHost1_MyWebApp>("mywebapp1")
     .WithEndpoint("http", ea => ea.IsProxied = false)
     .WithEndpoint("https", ea => ea.IsProxied = false)
-    .WithExternalHttpEndpoints();
+    .WithExternalHttpEndpoints()
+    .WithReference(keycloak);
 builder.AddProject<Projects.TestingAppHost1_MyWorker>("myworker1")
     .WithEndpoint(name: "myendpoint1");
 builder.AddPostgres("postgres1");

tests/TestingAppHost1/TestingAppHost1.AppHost/TestingAppHost1.AppHost.csproj

@@ -12,6 +12,7 @@
     <ProjectReference Include="..\..\..\src\Aspire.Hosting.AppHost\Aspire.Hosting.AppHost.csproj" IsAspireProjectResource="false" />
     <ProjectReference Include="..\..\..\src\Aspire.Hosting.PostgreSQL\Aspire.Hosting.PostgreSQL.csproj" IsAspireProjectResource="false" />
     <ProjectReference Include="..\..\..\src\Aspire.Hosting.Redis\Aspire.Hosting.Redis.csproj" IsAspireProjectResource="false" />
+    <ProjectReference Include="..\..\..\src\Aspire.Hosting.Keycloak\Aspire.Hosting.Keycloak.csproj" IsAspireProjectResource="false" />
     <ProjectReference Include="..\TestingAppHost1.MyWebApp\TestingAppHost1.MyWebApp.csproj" />
     <ProjectReference Include="..\TestingAppHost1.MyWorker\TestingAppHost1.MyWorker.csproj" />
   </ItemGroup>