Prevent boards product from being included automatically (#23539)

* Prevent boards product from being included automatically

* Fix config diff test

* Update prepackaged plugin version

Co-authored-by: Scott Bishel <scott.bishel@mattermost.com>

* Readd boards/dist to the gitignore

* Does not enable the focalboard plugin by default

* Update plugin version to v7.10.3

---------

Co-authored-by: Scott Bishel <scott.bishel@mattermost.com>

server/public/plugin/environment.go

@@ -107,7 +107,6 @@ var pluginIDBlocklist = map[string]bool{
 	"playbooks": true,
 	"com.mattermost.plugin-incident-response":   true,
 	"com.mattermost.plugin-incident-management": true,
-	"focalboard": true,
 }
 
 func PluginIDIsBlocked(id string) bool {