mattermost update to 9.2.2-bb.0

Package Merge Request

Package Changes

• Updated Mattermost image from 9.2.1 -> 9.2.2
• Modified cypress tests to account for GUI changes
• Updated minio dependency version

Package MR

big-bang/product/packages/mattermost!164 (merged)

For Issue

Closes big-bang/product/packages/mattermost#94 (closed)