fix: add correct import for exceptions

[sanga8]

resolves #439

Description

Add exceptions import: from dbt.adapters.exceptions.connection import FailedToConnectError from dbt_common.exceptions import ExecutableError

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.

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[sanga8]

@moomindani Just fixed an import. I wasn't able to identify why the import wasn't done correctly, because I did not have this bug previously. Would you have any idea?

[moomindani]

Thanks for contributing as always. When we upgraded from dbt 1.7 to 1.8, it included some class changes, but I do not have any other idea..