tests: Add test that decimal obtained as CAST from integer always contain one decimal place.
tests: Add test that decimal obtained as CAST from integer always contain one decimal place.

Signed-off-by: Daniel Fiala <3d0f3b9ddcacec30c4008c5e030e6c13a478cb4f@scylladb.com>

scylladb/scylla,duarten/scylla,avikivity/scylla,duarten/scylla,scylladb/scylla,scylladb/scylla,avikivity/scylla,duarten/scylla,avikivity/scylla,scylladb/scylla