Add external_access_integration and secret to python model impl

[Lindblomsebastian]

This resolves #925
docs: dbt-labs/docs.getdbt.com#5262

Problem

EXTERNAL_ACCESS_INTEGRATION and SECRETS are not populated in the generated PROC

Solution

Add EXTERNAL_ACCESS_INTEGRATION and SECRETS to the generated PROC if they are part of the config.

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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[Lindblomsebastian]

CLA has now been signed.

[ernestoongaro]

@Lindblomsebastian

I'm getting failures from the secrets test: dbt.log
invalid property 'SECRETS' for 'FUNCTION'

and as well for the external access integrations test: (adding extra quotes) dbt.log

  invalid value ''test_external_access_integration'' for property 'EXTERNAL_ACCESS_INTEGRATIONS'

[Lindblomsebastian]

@Lindblomsebastian

I'm getting failures from the secrets test: dbt.log invalid property 'SECRETS' for 'FUNCTION'

and as well for the external access integrations test: (adding extra quotes) dbt.log

  invalid value ''test_external_access_integration'' for property 'EXTERNAL_ACCESS_INTEGRATIONS'

I missed that the secrets you specify as values must also be specified in the external access integration. (See https://docs.snowflake.com/en/developer-guide/external-network-access/creating-using-external-network-access#using-the-external-access-integration-in-a-function-or-procedure)
@colin-rogers-dbt, would you mind adding a secret named test_secret to the test_external_access_integration? I've included the SQL commands as comments in the test (See d1517b4#diff-47b9e84b411efd20b1b24f2f1e566455bc7f6dc21021bac6c160efcd76768a60R210-R216).

[ernestoongaro]

@colin-rogers-dbt, would you mind adding a secret named test_secret to the test_external_access_integration?

i've done this today but due to the security integration needing to know the schema of the secret I can't quite get it to work so asked ❄️ for help

[ernestoongaro]

Off to @colin-rogers-dbt for review now!

[dbeatty10]

Since this PR introduces a new user interface (model-level config for external_access_integrations), I've added the user docs label, and I'll ping our documentation team to make sure that they have it tracked.

cc: @dataders

[colin-rogers-dbt]

Since this PR introduces a new user interface (model-level config for external_access_integrations), I've added the user docs label, and I'll ping our documentation team to make sure that they have it tracked.

cc: @dataders

Thanks @dbeatty10 !

[ernestoongaro]

@dbeatty10 @colin-rogers-dbt - I have a PR for docs: dbt-labs/docs.getdbt.com#5262