WL#14175: Rename and deprecate group_replication_ip_whitelist

Affects: Server-8.0   —   Status: Complete

It has been decided to deprecate artefacts using the terminology
"whitelist/blacklist" in favour of "allowlist/blocklist".

GR has one variable called "group_replication_ip_whitelist"

This WL will deprecate "group_replication_ip_whitelist" in favour
of a variable called "group_replication_ip_allowlist".

The variable name will also be changed in the error message
ER_GRP_RPL_GRP_COMMUNICATION_INIT_WITH_CONF and in various file
names in the source code.

User stories:
As a MySQL User/DBA/Operator I want to replace whitelist/blacklist
with allowlist/blocklist, so I user a more modern terminology in
the product.