Get rid of installer feature since we don't need additional DI stuff for installers

Author: danielmarbach

src/NServiceBus.Storage.MongoDB/InstallerFeature.cs

@@ -42,7 +42,7 @@ public MongoPersistence()
 
             s.SetDefault(new MemberMapCache());
 
-            s.EnableFeatureByDefault<InstallerFeature>();
+            s.SetDefault(new InstallerSettings());
         });
 
         Supports<StorageType.Sagas>(s => s.EnableFeatureByDefault<SagaStorage>());

src/NServiceBus.Storage.MongoDB/MongoPersistence.cs

@@ -9,12 +9,13 @@
 using Installation;
 using Settings;
 
-sealed class OutboxInstaller(IReadOnlySettings settings, InstallerSettings installerSettings) : INeedToInstallSomething
+sealed class OutboxInstaller(IReadOnlySettings settings) : INeedToInstallSomething
 {
     internal const string OutboxCleanupIndexName = "OutboxCleanup";
 
     public async Task Install(string identity, CancellationToken cancellationToken = default)
     {
+        var installerSettings = settings.Get<InstallerSettings>();
         if (installerSettings.Disabled || !settings.TryGet<Func<IMongoClient>>(SettingsKeys.MongoClient, out Func<IMongoClient>? client))
         {
             return;

src/NServiceBus.Storage.MongoDB/Outbox/OutboxInstaller.cs

@@ -9,10 +9,11 @@
 using Sagas;
 using Settings;
 
-sealed class SagaInstaller(IReadOnlySettings settings, InstallerSettings installerSettings) : INeedToInstallSomething
+sealed class SagaInstaller(IReadOnlySettings settings) : INeedToInstallSomething
 {
     public async Task Install(string identity, CancellationToken cancellationToken = default)
     {
+        var installerSettings = settings.Get<InstallerSettings>();
         if (installerSettings.Disabled || !settings.TryGet<Func<IMongoClient>>(SettingsKeys.MongoClient, out Func<IMongoClient>? client))
         {
             return;

src/NServiceBus.Storage.MongoDB/Sagas/SagaInstaller.cs

@@ -7,10 +7,11 @@ namespace NServiceBus.Storage.MongoDB;
 using Installation;
 using Settings;
 
-sealed class SubscriptionInstaller(IReadOnlySettings settings, InstallerSettings installerSettings) : INeedToInstallSomething
+sealed class SubscriptionInstaller(IReadOnlySettings settings) : INeedToInstallSomething
 {
     public async Task Install(string identity, CancellationToken cancellationToken = default)
     {
+        var installerSettings = settings.Get<InstallerSettings>();
         if (installerSettings.Disabled || !settings.TryGet<Func<IMongoClient>>(SettingsKeys.MongoClient, out Func<IMongoClient>? client))
         {
             return;