- This is not needed for non-const regexp array arguments (the
cardinality of arrays is fixed per column) but it cleans up the code
and runs the check only in functions which have restrictions on the
number of patterns.
- For functions using hyperscans, it was checked that the number of
regexes is < 2^32. Removed the check because I don't think anyone will
every specify 4 billion patterns.
- The patterns are not used in hashing, there should not be a performance
impact when we use stuff from the standard library instead.
- added forgotten .reserve() in FunctionsMultiStringPosition.h
