Function adapter.get_columns_in_relation doesn't work if model is materialized as Ephemeral

[vlnauc]

Bug Description

I created macro and used function adapter.get_columns_in_relation(model) to get all columns in model, when model is materialized as ephemeral, macro doesn't return any rows, when I change materialization of model to view or table, macro correctly returns all columns in model.

Steps To Reproduce

1. Create model and define its materialization as ephemeral

2. Create macro with function adapter.get_columns_in_relation in for cycle to return full list of column of model

{# macros name is no_nulls_in_columns - its used in step 3 #}
{% macro no_nulls_in_columns(model) %}
    SELECT * FROM {{ model }} WHERE
    {% for col in adapter.get_columns_in_relation(model) -%}
        {{ col.column }} IS NULL
        {%- if not loop.last %} OR{% endif %}
    {% endfor %}
{% endmacro %}

3. Create sql that uses macro and verify generated code, its should contain all columns

{{ no_nulls_in_columns(model) }}

Expected behavior

I expect fuction adapter.get_columns_in_relation(model) return returns full list of column of model no matter if model is materializes as view, table or ephemeral

Screenshots and log output

If applicable, add screenshots or log output to help explain your problem.

The output of dbt --version:

Core:
  - installed: 1.8.7
  - latest:    1.8.8 - Update available!

  Your version of dbt-core is out of date!
  You can find instructions for upgrading here:
  https://docs.getdbt.com/docs/installation

Plugins:
  - teradata: 1.8.1 - Up to date!

The operating system you're using:
Win 10 Enterprise, Version 22H2
The output of python --version:
Python 3.11.0