feat: add to_query_object method (#2239)

This PR adds a `to_query_object` method to the various query builders
(except not hybrid queries yet). This makes it possible to inspect the
query that is built.

In addition this PR does some normalization between the sync and async
query paths. A few custom defaults were removed in favor of None (with
the default getting set once, in rust).

Also, the synchronous to_batches method will now actually stream results

Also, the remote API now defaults to prefiltering

python/python/tests/test_remote_db.py

@@ -315,7 +315,7 @@ def test_query_sync_minimal():
         assert body == {
             "distance_type": "l2",
             "k": 10,
-            "prefilter": False,
+            "prefilter": True,
             "refine_factor": None,
             "lower_bound": None,
             "upper_bound": None,
@@ -340,7 +340,7 @@ def test_query_sync_empty_query():
             "filter": "true",
             "vector": [],
             "columns": ["id"],
-            "prefilter": False,
+            "prefilter": True,
             "version": None,
         }
 
@@ -478,7 +478,7 @@ def test_query_sync_hybrid():
             assert body == {
                 "distance_type": "l2",
                 "k": 42,
-                "prefilter": False,
+                "prefilter": True,
                 "refine_factor": None,
                 "vector": [0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0],
                 "nprobes": 20,