tests: serialization-deserialization tests

This commit refactors and adds additional tests related to serialization
inside integration tests. It adds coverage for most scalar types,
additional cases for more complex types such as Uuid and Text, Null
checking inside queries and also splits certain test cases into multiple
tests to separate expected failures from expected successes.

scylla/tests/integration/main.rs

@@ -2,8 +2,6 @@ mod authenticate;
 mod batch;
 mod consistency;
 mod cql_collections;
-mod cql_types;
-mod cql_value;
 mod default_policy;
 mod execution_profiles;
 mod history;
@@ -13,6 +11,7 @@ mod lwt_optimisation;
 mod new_session;
 mod retries;
 mod self_identity;
+mod serialization;
 mod shards;
 mod silent_prepare_batch;
 mod silent_prepare_query;