add "ann" as reserved keyword

[Hazel-Datastax]

I found a corner case when using Data API (stargate/data-api#1806). I cannot use ann as my table name, but I can use it in CQL:

cassandra@cqlsh:default_keyspace> CREATE TABLE default_keyspace."ann" (t text PRIMARY KEY,v VECTOR<float,5>);

The reason is, inside the Java Driver, it has a set that contains all the reserved keywords. When the query builder builds the create table query, it will call tableName.asCql(true). Inside asCql(true) method, it will check if the string is in the reserved keywords set and double quoted if it’s in. Unfortunately, the set doesn’t contain ann.

I guess ann was introduced later and the keywords set hasn't been updated accordingly.