We have many timeseries tests under jstests/core/timeseries/ that use the following pattern to check if the timeseries collection is sharded.

const bucketsColl = db.getCollection('system.buckets.' + coll.getName());
const isShardedTimeseries = FixtureHelpers.isSharded(bucketsColl);

For viewless timeseries collection the system.buckets collection does not exist so we should check directly if `coll` is sharded rather than the buckets collection.

The goal of this ticket is to replace these checks with a new logic that:
 - Works also for viewless timeseries collection
 - Works also in mutiverison suites.