wifi: iwlwifi: mld: Add dump handler to iwl_mld

Implement a dump handler in the iwl_mld operation mode to
collect firmware dump upon trigger from trans layer.

Signed-off-by: Pagadala Yesu Anjaneyulu <pagadala.yesu.anjaneyulu@intel.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Link: https://patch.msgid.link/20250611222325.18ebf46690ce.Ia52941f761a446cb3e43cbe49d2b9a49fc15f4a8@changeid