v6: Per-collection-handle consistency

[bevzzz]

This PR adds an option to set default consistency level on a CollectionHandle/-Async. If set, consistency level will be applied to all operations in query and data namespaces.

The API is simple and similar to that in the Python client:

// Derive a modified collection handle with a different ConsistencyLevel
var things = client.collections.use("Things");
var thingsQuorum = things.withConsistencyLevel(ConsistencyLevel.QUORUM);
var thingsAll = things.withConsistencyLevel(ConsistencyLevel.ALL);

// Or configure it immediately on creation
var thingsOne = client.collections.use("Things",
    with -> with.consistencyLevel(ConsistencyLevel.ONE));

CollectionHandle/-Async can be inspected:

things.consistencyLevel() // returns null
thingsAll.consistencyLevel() // returns ConsistencyLevel.ALL

Default ConsistencyLevel can be overridden for an individual query. For example, this search is done with ConsistencyLevel.ONE.

thingsAll.query.nearObject(
    "test-uuid",
     q -> q.consistencyLevel(ConsistencyLevel.ONE));

[orca-security-eu]

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