wifi: iwlwifi: mvm: remove MLO code

wifi: iwlwifi: mvm: remove MLO code

Now as we have iwlmld, which is the op-mode that will be loaded for
EHT capable devices, there is no need for EHT features in iwlmvm.
This change removes:
- The logic of entering and exiting EMLSR
- Link selection
- MLO scan
- relevant Kunit tests
- related debugfs entries

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/20250821204455.933bb1a12e42.I3d017c30ffc2a29bc12ff0270562bcfb234c0785@changeid