to_timestamp() fails when passed mix of scalar and array args

[neilconway]

Describe the bug

When to_timestamp() was invoked with a scalar Float64 and an array of strings, the implementation neglects to broadcast the scalar to the array properly when producing the return value.

To Reproduce

CREATE TABLE t61(v2 STRING);
INSERT INTO t61(v2) VALUES ('flX'), ('3');

SELECT TO_TIMESTAMP(123.5, tt0.v2) FROM t61 AS tt0;

Yields

Internal error: UDF to_timestamp returned a different number of rows than expected. Expected: 2, Got: 1

Expected behavior

No response

Additional context

No response