fix(sqlalchemy-bigquery): update literal binds test for SQLAlchemy 2.0

[chalmerlowe]

This PR fixes the sqlalchemy-bigquery portion of Issue #16042.

Problem:
test_compiled_query_literal_binds was skipped for SQLAlchemy >= 2.0 because it was failing. The failure occurs because in SQLAlchemy 2.0, Connection.execute() expects an executable object or a string (wrapped in text()), and passing a Compiled object directly is no longer supported.

Fix:

• Removed the skip condition for SQLAlchemy >= 2.0.
• Modified the test to wrap the compiled query string in sqlalchemy.text() before passing it to conn.execute().

This allows the test to run and pass on SQLAlchemy 2.0.

[gemini-code-assist]

Code Review

This pull request enables the test_compiled_query_literal_binds test for SQLAlchemy 2.0 and updates the execution logic to use sqlalchemy.text(str(compiled)). Feedback suggests that using sqlalchemy.text() may cause issues if the SQL contains colons, as SQLAlchemy might misinterpret them as bind parameters. It is recommended to use exec_driver_sql where available to ensure safer execution and better compatibility across different SQLAlchemy versions.

[gemini-code-assist]

Using sqlalchemy.text() on a string generated with literal_binds=True can be problematic if the SQL contains colons (e.g., in timestamps or string literals), as SQLAlchemy will attempt to interpret them as bind parameters. A more robust approach that maintains compatibility across SQLAlchemy 1.3, 1.4, and 2.0 is to use exec_driver_sql when available, as it bypasses parameter parsing entirely and is the recommended way to execute raw SQL strings in modern SQLAlchemy.

Suggested change

	result = conn.execute(sqlalchemy.text(str(compiled))).fetchall()
	if hasattr(conn, "exec_driver_sql"):
	result = conn.exec_driver_sql(str(compiled)).fetchall()
	else:
	result = conn.execute(compiled).fetchall()

[gemini-code-assist]

Same as above: using exec_driver_sql is safer for literal binds to avoid potential issues with colon parsing in SQLAlchemy 1.4 and 2.0.

Suggested change

	result = conn.execute(sqlalchemy.text(str(compiled))).fetchall()
	if hasattr(conn, "exec_driver_sql"):
	result = conn.exec_driver_sql(str(compiled)).fetchall()
	else:
	result = conn.execute(compiled).fetchall()