Update connections.py so it doesn’t run anything after its canceled

[julio-romero]

resolves #711
docs

Problem

The queries arent cancelled after typing ctrl + c in console, this might have several performance issues

Solution

Changed the cancel command from

system$abort_session(session_id)

to

system$cancel_all_queries(session_id)

Checklist

• I have read the contributing guide and understand what's expected of me
• I have run this code in development and it appears to resolve the stated issue
• This PR includes tests, or tests are not required/relevant for this PR
• This PR has no interface changes (e.g. macros, cli, logs, json artifacts, config files, adapter interface, etc) or this PR has already received feedback and approval from Product or DX

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[mikealfare]

@julio-romero Could you please add a changie for this update? I would classify this as a bug in the changie.

[dbeatty10]

@julio-romero and @mikealfare I just pushed two changes:

• small update to (hopefully) pass CI
• changelog entry

I didn't give a ton of thought to the verbiage in the changelog entry, so feel free to update it as-needed.

[mikealfare]

Integration tests are getting skipped. I created a branch with these changes in dbt-labs to run the integration tests. Results are here: https://github.com/dbt-labs/dbt-snowflake/actions/runs/5772393775

Results: ✅

[jomccr]

Can somebody test this on a real snowflake model and verify that the fix actually works? I wasn't able to get my local build of the dbt-snowflake adapter actually working.