XCP-ng 8.2 updates announcements and testing

[gduperrey]

We have identified an issue related to Xostor and HA management in the http-nbd-transfer-1.4.0-1.xcpng8.2 package. We therefore prefer to remove it from these updates while waiting for a future corrected version.

For those who have tested these updates and who have Xostor on their test pool, we invite you to downgrade this package to version 1.3.0 with the following command:

yum downgrade http-nbd-transfer