Add missing wait_resource column for activity collections (#11638)
Add missing wait_resource column for activity collections (#11638)

SQLServer [dm_exec_requests](https://docs.microsoft.com/en-us/sql/relational-databases/system-dynamic-management-views/sys-dm-exec-requests-transact-sql?view=sql-server-ver15) table has a `wait_resource` column, which we should show when we display blocking query trees
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