test: flaky vinyl-luatest/select_consistency_test.lua

[NickVolynkin]

Test https://github.com/tarantool/tarantool/blob/master/test/vinyl-luatest/select_consistency_test.lua is flaky

• branch: master
• OS and version: Ubuntu 20.04
• Architecture: amd64
• gc64: off
• debug mode: on
• job: coverage

[Buristan]

Side note: Can also reproduce with jit.off() jit.flush(). LuaJIT-unrelated.