This commit renames "huddle" to "direct_message_group" in the
web codebase. It also renames the file - "huddle_data.ts" to
"direct_message_group_data.ts"
Fixes part of #28640
This commit renames the file "huddle_data.ts" to
"direct_message_group_data.ts" in the web codespace.
This is a part of the migration of huddle to direct_message_group
of #28640.