add model_incremental_strategy to track_model_run

[MichelleArk]

Resolves #10761 https://github.com/dbt-labs/iglu.getdbt.com/issues/28

Problem

In order to track adoption of the new microbatch strategy, we'll need to track which incremental_strategy configs users are setting.

Solution

Obtain the optional incremental strategy config and plumb it through the tracking event.

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 or 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.
• This PR includes type annotations for new and modified functions.

[github-actions]

Thank you for your pull request! We could not find a changelog entry for this change. For details on how to document a change, see the contributing guide.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 88.97%. Comparing base (db69473) to head (3c0760e).

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #10758   +/-   ##
=======================================
  Coverage   88.97%   88.97%           
=======================================
  Files         181      181           
  Lines       22956    22958    +2     
=======================================
+ Hits        20424    20426    +2     
  Misses       2532     2532           

Flag	Coverage Δ
integration	86.14% <100.00%> (+<0.01%)	⬆️
unit	62.44% <33.33%> (-0.01%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Components	Coverage Δ
Unit Tests	62.44% <33.33%> (-0.01%)	⬇️
Integration Tests	86.14% <100.00%> (+<0.01%)	⬆️

[QMalcolm]

🚀