perf: add column scan test

The test creates a space with 1 million rows and 100 columns storing
unsigned integer values (both row and column count are configurable)
and sums values over the first and the last columns.

By default the test uses the iterator C API but one may switch to the
column scanner C API and/or raw read view C API (both features are
exclusive to the Enterprise Edition).

It's also possible to specify the engine to use (default is memtx).

Closes tarantool/tarantool-ee#659

NO_DOC=perf test
NO_TEST=perf test
NO_CHANGELOG=perf test