fix(dbt-fal): handle new relation quoting for Python introduced in dbt-1.4.5

[chamini2]

Description

We are seeing

Error: 00:24:01.472113 [error] [MainThread]: Table “freshness_table” not found

This was introduced in dbt-labs/dbt-core#7114

def source(*args, dbt_load_df_function):
    sources = {"freshness_test.freshness_table": "test.dbt_fal_custom.freshness_table"}
    key = ".".join(args)
    return dbt_load_df_function(sources[key])

vs

def source(*args, dbt_load_df_function):
    sources = {"freshness_test.freshness_table": "\"test\".\"dbt_fal_custom\".\"freshness_table\""}
    key = '.'.join(args)
    return dbt_load_df_function(sources[key])

Notice the quotes in the sources dict.

Integration tests

Adapter to test:

• postgres

Python version to test:

• 3.8

[linear]

FEA-956 Fix dbt-fal with dbt-core 1.4.5

[mederka]

LGTM but the tests are failing 🤔

[chamini2]

The failures are unrelated to this problem

Failing scenarios:
features/cloud.feature:6 Run a Python model with Isolate Cloud
features/cloud.feature:14 Run a Python model with Isolate Cloud and conda
features/source.feature:21 Run a Python model that queries a source with Isolate Cloud

Let's handle that in a different PR