Add hard_deletes config and new_record Option for Snapshots

[peterallenwebb]

resolves dbt-labs/dbt-core#10235

The corresponding dbt-core PR adds the new configuration values: dbt-labs/dbt-core#10972

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

[github-actions]

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[mikealfare]

I left a few comments, some of them maybe speaking to my ignorance when it comes to the snapshot materialization. Aside from that, will there be tests associated with this change? I would have expected some updates in dbt-tests-adapter in this PR as well as a PR in something like dbt-postgres that points to this branch.

[colin-rogers-dbt]

Please add tests.

[peterallenwebb]

@colin-rogers-dbt I'm discussing the testing strategy with @mikealfare now. I'm adding tests in dbt-core, which is where most of the snapshot testing infrastructure already exists. I'm willing to try to get some of that infrastructure moved over into this repo, and I think that makes sense, but I'm worried that gating on that could jeopardize getting this into 1.9rc1, @graciegoheen.

I have addressed the change request by adding a test!

[mikealfare]

@cla-bot check

[mikealfare]

@peterallenwebb is a member of dbt Labs, hence has signed the CLA. Merging without this branch check running by manual confirmation.