tests: MappedAsDataclass - skip table binding

With SQLAlchemy 2.0.36 mapping as a dataclass while also providing
a ``__table__`` attribute is not supported.

Skip associated test when ``MappedAsDataclass`` is in use.

Fixes: pallets-eco#1378

Author: James Page

Diff for: tests/test_model_bind.py

@@ -1,6 +1,8 @@
 from __future__ import annotations
 
+import pytest
 import sqlalchemy as sa
+import sqlalchemy.orm as sa_orm
 
 from flask_sqlalchemy import SQLAlchemy
 
@@ -76,15 +78,18 @@ class User(db.Model):
 
 
 def test_explicit_table(db: SQLAlchemy) -> None:
-    user_table = db.Table(
-        "user",
-        sa.Column("id", sa.Integer, primary_key=True),
-        bind_key="auth",
-    )
-
-    class User(db.Model):
-        __bind_key__ = "other"
-        __table__ = user_table
-
-    assert User.__table__.metadata is db.metadatas["auth"]
-    assert "other" not in db.metadatas
+    if not issubclass(db.Model, (sa_orm.MappedAsDataclass)):
+        user_table = db.Table(
+            "user",
+            sa.Column("id", sa.Integer, primary_key=True),
+            bind_key="auth",
+        )
+
+        class User(db.Model):
+            __bind_key__ = "other"
+            __table__ = user_table
+
+        assert User.__table__.metadata is db.metadatas["auth"]
+        assert "other" not in db.metadatas
+    else:
+        pytest.skip("Explicit table binding with mapped dataclasses not supported")