Sql. Add for-loop support to SQL logic tests.

In order to simplify tests in the SQLLogic test suite, we can add parameterisation support via for loops (iteration over sequence of values).

In addition to that we can also replace placeholders in expected results (at the moment replacement is only done for a query string):

# Single value

for k in [1, 2, 3, 4]
query T
SELECT ${k}
----
${k}

endfor

We can also escape a comma symbol so it possible to use `DECIMAL(p,s)` in tests:

for k in [ DECIMAL(4), DECIMAL(4\,1) ]

statement ok
SELECT 1::${type}

endfor