fix!: allow columns to types to have spaces

[tobymao]

No description provided.

[eakmanrq]

Since the fix is just applied at the select expressions, I'm wondering if there are other places that we use columns_to_types that doesn't properly support spaces. Can you make sure that pandas handles it fine without quotes? Also these are some other places to think about:

https://github.com/TobikoData/sqlmesh/blob/6dc113a4e49b3ab6ea0dc22cefdcccdc179a64bf/sqlmesh/core/engine_adapter/duckdb.py#L43
https://github.com/TobikoData/sqlmesh/blob/6dc113a4e49b3ab6ea0dc22cefdcccdc179a64bf/sqlmesh/core/engine_adapter/bigquery.py#L266
https://github.com/TobikoData/sqlmesh/blob/6dc113a4e49b3ab6ea0dc22cefdcccdc179a64bf/sqlmesh/core/engine_adapter/mixins.py#L66
https://github.com/TobikoData/sqlmesh/blob/6dc113a4e49b3ab6ea0dc22cefdcccdc179a64bf/sqlmesh/core/engine_adapter/spark.py#L163