new behaviour of empty or nil `select` calls on user spaces

[TarantoolBot]

Product: Tarantool
Since: 2.10.0
SME: @ alyapunov, @ CuriousGeorgiy

Should be done as part of #2818

Details

A critical log entry containing the current stack
traceback is created upon empty or nil select calls on user spaces.

A user can explicitly request a full scan though by passing
fullscan = true to select's options table argument in which a case a
log entry will not be created.

Requested by @CuriousGeorgiy in tarantool/tarantool@7aa02f3

[locker]

This functionality is going to be removed, see tarantool/tarantool#10885.