Feature: @@last_generated_uuid system session variable
#2358
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Dolt recommends customers prefer UUIDs over
auto_incrementvalues where possible. Forauto_incrementcolumns, the MySQLlast_insert_id()function helps to retrieve the last generated ID, but there's not an analogue for UUIDs. This PR adds a new system session variable,@@last_generated_uuidthat is populated each time theUUID()function is executed. Note that this is not a standard MySQL behavior.Customer request: dolthub/dolt#7547