Jail/chroot nginx process inside controller container (#8337)

* Initial work on chrooting nginx process

* More improvements in chroot

* Fix charts and some file locations

* Fix symlink on non chrooted container

* fix psp test

* Add e2e tests to chroot image

* Fix logger

* Add internal logger in controller

* Fix overlay for chrooted tests

* Fix tests

* fix boilerplates

* Fix unittest to point to the right pid

* Fix PR review

rootfs/etc/nginx/lua/monitor.lua

@@ -26,7 +26,7 @@ local _M = {}
 
 local function send(payload)
   local s = assert(socket())
-  assert(s:connect("unix:/tmp/prometheus-nginx.socket"))
+  assert(s:connect("unix:/tmp/nginx/prometheus-nginx.socket"))
   assert(s:send(payload))
   assert(s:close())
 end