Use wrap_parameters in pipelines controller

This makes it possible to workaround a bug in `safe_constantize` which
caused a `LoadError` exception when doing

```
"Pipeline".safe_constantize
LoadError: Unable to autoload constant Pipeline, expected
/home/grzesiek/gdk/gitlab/app/models/ci/pipeline.rb to define it
```

See https://github.com/rails/rails/issues/28854 for more details.

app/controllers/projects/pipelines_controller.rb

@@ -6,6 +6,8 @@ class Projects::PipelinesController < Projects::ApplicationController
   before_action :authorize_update_pipeline!, only: [:retry, :cancel]
   before_action :builds_enabled, only: :charts
 
+  wrap_parameters Ci::Pipeline
+
   def index
     @scope = params[:scope]
     @pipelines = PipelinesFinder