Deprecated `CommerceConnection#getClone`

CommerceConnection#getClone has been deprecated as it should only be called from internal code.

The method is slated for removal.

(CMS-15859)

Removed various LC spring XML files

The various LC spring XML files provided by artifact com.coremedia.blueprint.base:bpbase-lc-common were converted to spring java config. In general there should be no need to import any LC base configuration explicitly because the artifact provides spring boot autoconfiguration class com.coremedia.blueprint.base.livecontext.ecommerce.common.BaseCommerceServicesAutoConfiguration .

(CMS-15143)