tests: enable vector integration tests on Scylla 2025.4+

Vector type is supported on Scylla 2025.4 and above.
Enable the integration tests.

Tested locally against both 2025.4.2 and 2026.1 and they pass.

Signed-off-by: Yaniv Kaul <yaniv.kaul@scylladb.com>

Author: mykaul