chore: update lance dependency to v12.0.0-beta.15 (#4143)

Updates the Rust workspace Lance dependencies, Cargo lockfile, and Java
lance-core from v12.0.0-beta.14 to
[v12.0.0-beta.15](https://github.com/lance-format/lance/releases/tag/v12.0.0-beta.15).
No compatibility fixes were required; `cargo clippy --quiet --workspace
--tests --all-features -- -D warnings`, `cargo fmt --all --quiet`, and
`git diff --check` passed.

---------

Co-authored-by: Jack Ye <yezhaoqin@gmail.com>

python/python/tests/test_namespace.py

@@ -193,7 +193,13 @@ class TestNamespaceConnection:
             ),
         )
 
-        table = db.create_table("blob_table", data, namespace_path=["test_ns"])
+        # Legacy v1 blob columns are only writable at file version <= 2.1.
+        table = db.create_table(
+            "blob_table",
+            data,
+            namespace_path=["test_ns"],
+            storage_options={"new_table_data_storage_version": "2.1"},
+        )
         df = table.to_pandas(blob_mode="lazy").sort_values("id")
 
         blob = df["blob"].iloc[0]