Default threat_monitoring#edit type parameter

- to :container_policy

ee/app/controllers/projects/threat_monitoring_controller.rb

@@ -19,7 +19,7 @@ module Projects
         project,
         environment_id: params[:environment_id],
         id: params[:id],
-        type: params[:type],
+        type: :container_policy,
         kind: params[:kind]
       )
     end

ee/spec/controllers/projects/threat_monitoring_controller_spec.rb

@@ -151,6 +151,7 @@ RSpec.describe Projects::ThreatMonitoringController do
             project,
             environment_id: environment_id,
             id: 'policy',
+            type: :container_policy,
             kind: kind
           )
         )

locale/gitlab.pot

@@ -22541,9 +22541,6 @@ msgstr ""
 msgid "NetworkPolicies|Network traffic"
 msgstr ""
 
-msgid "NetworkPolicies|New policy"
-msgstr ""
-
 msgid "NetworkPolicies|None selected"
 msgstr ""