data file without suffix can't be read correctly

[RTEnzyme]

Describe the bug
My data files in linux don't have ".csv" suffix. When I use ctx.read_csv("path/to/csv"), It read blank data rather than the data in my files or an error.

To Reproduce
Use the case in the example csv_sql.rs. I remove the csv file's suffix and cpy /path/to/aggregate_test_100.csv /path/to/aggregate_test_100.

  // register csv file with the execution context
  ctx.register_csv(
      "aggregate_test_100",
      &format!("{testdata}/csv/aggregate_test_100"),
      CsvReadOptions::new(),
  )
  .await?;
 // execute the query
    let df = ctx
        .sql(
            "SELECT c1, MIN(c12), MAX(c12) \
        FROM aggregate_test_100 \
        WHERE c11 > 0.1 AND c11 < 0.9 \
        GROUP BY c1",
        )
        .await?;

    // print the results
    df.show().await?;

The result:

Error: SchemaError(FieldNotFound { field: Column { relation: None, name: "c11" }, valid_fields: [] })

Expected behavior
I think that either the file can be read correctly in this case, or an error that the file suffix does not match will be reported.

Additional context
Add any other context about the problem here.

[tustvold]

I think this is a duplicate of #1736

[RTEnzyme]

I think this is a duplicate of #1736

Emm..I think so..