Fix table materialization for Delta models

resolves #419 with the first (maybe not the best) idea

Description

I modified the function get_relation to pass the argument is_delta to the relation's creation.
Then, I added a "or replace" in the glue\_createtable_as to be able to rebuild multiple times the same model.

I am pretty sure we could update the is_iceberg and is_hudi arguments in the same way hence render the iceberg_table_replace useless but I did not have time to test it out

Checklist

[x] I have signed the CLA
[x] I have run this code in development and it appears to resolve the stated issue
[x] This PR includes tests, or tests are not required/relevant for this PR
[x] I have updated the CHANGELOG.md and added information about my change to the "dbt-glue next" section.

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.

FYI :

I am not sure wether this change needs testing, if it does, I would be interested in understanding how to!

Tests that were run locally

Simple model with minimal table strategy (test_table):

{{
    config(
        materialized='table',
        file_format='delta',
    )
}}

with incoming_data as (
    select 1 as id
)

select * from incoming_data

No problem at first run but when running a second time the following command :

dbt run -s test_table

Got the following error :

15:25:56  Glue adapter: Glue returned `error` for statement None for code SqlWrapper2.execute('''/* {"app": "dbt", "dbt_version": "1.8.4", "profile_name": "data_platform_preparation", "target_name": "local", "node_id": "model.data_platform_preparation.test_table"} */

    create table xxx.test_table
    using delta
        LOCATION 's3://xxx/xxx/test_table/'
        as
with incoming_data as (
    select 1 as id
)

select * from incoming_data
  ''', use_arrow=False, location='s3://xxx'), AnalysisException: Cannot create table ('`lgdev_jnadal`.`test_table`'). The associated location ('s3://xxx/xxx/test_table') is not empty but it's not a Delta table

Now I can rebuild the model without problem, change its schema also works.

aws-samples / dbt-glue