[chore] update database caching library (#1040)

* convert most of the caches to use result.Cache{}

* add caching of emojis

* fix issues causing failing tests

* update go-cache/v2 instances with v3

* fix getnotification

* add a note about the left-in StatusCreate comment

* update EmojiCategory db access to use new result.Cache{}

* fix possible panic in getstatusparents

* further proof that kim is not stinky

internal/processing/instance.go

@@ -235,7 +235,7 @@ func (p *processor) InstancePatch(ctx context.Context, form *apimodel.InstanceSe
 	if updateInstanceAccount {
 		// if either avatar or header is updated, we need
 		// to update the instance account that stores them
-		if _, err := p.db.UpdateAccount(ctx, ia); err != nil {
+		if err := p.db.UpdateAccount(ctx, ia); err != nil {
 			return nil, gtserror.NewErrorInternalError(fmt.Errorf("db error updating instance account: %s", err))
 		}
 	}