Change `path_with_namespace` to `full_path` and other codestyle fixes

app/models/geo/deleted_project.rb

 class Geo::DeletedProject < ::Project
   after_initialize :readonly!
-  attr_reader :path_with_namespace
+  attr_reader :full_path
 
-  def initialize(id:, name:, path_with_namespace:, repository_storage:)
-    repository_storage = current_application_settings.pick_repository_storage unless repository_storage
+  def initialize(id:, name:, full_path:, repository_storage:)
+    repository_storage ||= current_application_settings.pick_repository_storage
 
     super(id: id, name: name, repository_storage: repository_storage)
-    @path_with_namespace = path_with_namespace
+    @full_path = full_path
   end
 
   def repository
-    @repository ||= Repository.new(path_with_namespace, self)
+    @repository ||= Repository.new(full_path, self)
   end
 end

app/workers/geo_repository_destroy_worker.rb

 class GeoRepositoryDestroyWorker
   include Sidekiq::Worker
   include GeoQueue
+  include Gitlab::ShellAdapter
 
-  def perform(id, name, path_with_namespace)
-    repository_storage = probe_repository_storage(path_with_namespace)
+  def perform(id, name, full_path)
+    repository_storage = probe_repository_storage(full_path)
 
     # We don't have access to the original model anymore, so we are
     # rebuilding only what our service class requires
-    project = ::Geo::DeletedProject.new(id: id, name: name, path_with_namespace: path_with_namespace, repository_storage: repository_storage)
+    project = ::Geo::DeletedProject.new(id: id, name: name, full_path: full_path, repository_storage: repository_storage)
 
     ::Projects::DestroyService.new(project, nil).geo_replicate
   end
@@ -20,11 +21,9 @@ class GeoRepositoryDestroyWorker
   # we need to probe on all existing ones.
   #
   # if we don't find it means it has already been deleted and we just return
-  def probe_repository_storage(path_with_namespace)
-    gitlab_shell = Gitlab::Shell.new
-
+  def probe_repository_storage(full_path)
     Gitlab.config.repositories.storages.each do |repository_storage, rs_data|
-      return repository_storage if gitlab_shell.exists?(rs_data['path'], path_with_namespace + '.git')
+      return repository_storage if gitlab_shell.exists?(rs_data['path'], full_path + '.git')
     end
 
     nil