Destination Redshift: Fixed maximum record size for SUPER type (#12940)

* fix #12680: use correct max size for SUPER type

* address review comments

* docs: add changelog entry

* bump version

* test: make large record actually too big

* fix: use a method instead of member variable for correct override

* fix: if overall object is invalid, don't check individual elements

* feat: add unit test for isValidData

* auto-bump connector version

Co-authored-by: Octavia Squidington III <octavia-squidington-iii@users.noreply.github.com>