Add query tag back to incremental models

[mikealfare]

Problem

We inadvertently removed query tags on incremental models when implementing Iceberg support.

Solution

• Add query tags back to incremental models
• Fix the query tag test that should have caught this, but didn't

I'm skipping the changelog on this since this is a pre-regression that we caught prior to final release.

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

[mikealfare]

If you look at the successful runs, they warn that models.tests, seeds.tests, and snapshots.tests were unused configuration paths. In other words, the post-hook never ran. We also know that since the post-hook references a macro that does not exist; it should have referenced check_query_tag instead of check_tag.

[mikealfare]

CI is failing due to the pending update for py38 retirement and the related change in branch protection rules. This should be resolved once the py38 retirement PR is merged, which contain the expected workflows.