OPENTHREAD_CONFIG_NETDATA_PUBLISHER_EXTRA_DELAY_TIME_TO_REMOVE_PREFERRED macro

@def OPENTHREAD_CONFIG_NETDATA_PUBLISHER_EXTRA_DELAY_TIME_TO_REMOVE_PREFERRED Specifies the extra wait time (in milliseconds) used when removing a preferred entry. When removing entries, certain entries are preferred over others. How the preference is determined depends on the entry type (e.g., (for DNS/SRP service entries associated with smaller RLOC16 or smaller IPv6 address are preferred). If the `Publisher` determines that its own entry is a preferred one, it adds the above extra wait time in addition to the random wait selected based on `OPENTHREAD_CONFIG_NETDATA_PUBLISHER_MAX_DELAY_TO_REMOVE` before removing its entry. This gives higher chance for a non-preferred entry from another device to be removed before removing a preferred entry which helps towards quicker convergence of the process to the desired number of entries. It is recommended that `OPENTHREAD_CONFIG_NETDATA_PUBLISHER_EXTRA_DELAY_TIME_TO_REMOVE_PREFERRED` to be set to a value larger than `OPENTHREAD_CONFIG_NETDATA_PUBLISHER_MAX_DELAY_TO_REMOVE` to ensure that non-preferred entries are removed first.