Regression tests: Change master_create_* calls with create_distributed_table

In Citus 6.0, we changed our table creation APIs. Customers would previously call `master_create_distributed_table()` and `master_create_worker_shards()` to create distributed tables. We deprecated these APIs in favor of `create_distributed_table()`.

We still use the deprecated APIs in 54 regression tests. We should update these regressions to the new APIs. We found that the old APIs fall into three groups:

- [ ] Creating hash distributed tables
- [ ] Creating append distributed tables (no `master_create_worker_shards`)
- [ ] Creating range distributed tables

As we are converting the old APIs, we should pay attention to the shard count and replication factor settings. Today, we set the replication factor through a GUC.