[nrf fromtree] mgmt: Allow to block confirming non-acive slots#3248

rlubos merged 3 commits intonrfconnect:mainnrfconnect/sdk-zephyr:mainfrom

tomchy:bugfix/mcumgr/NCSDK-NONE_Block_nonactive_slot_confirmation_ncstomchy/sdk-zephyr:bugfix/mcumgr/NCSDK-NONE_Block_nonactive_slot_confirmation_ncsCopy head branch name to clipboard