tests: add index + partition key test
tests: add index + partition key test

Tests covering querying both index and partition keys are added
- it's checked that such queries do not require filtering.

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