fix(ta): pass impl_type in finisher

[joseph-sentry]

we are currently not passing the impl_type to the rollups and flakes tasks in the finisher, even though the impl_type might be both, which means the tasks aren't running the logic they should be according to the feature flag

[sentry-io]

🔍 Existing Issues For Review

Your pull request is modifying functions with the following pre-existing issues:

📄 File: tasks/test_results_finisher.py

Function	Unhandled Issue
run_impl	TypeError: 'bool' object is not iterable app.task... Event Count: 60

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[sentry-autofix]

✅ Sentry found no issues in your recent changes ✅

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.71%. Comparing base (6e3bd8b) to head (857068f).
Report is 5 commits behind head on main.

✅ All tests successful. No failed tests found.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1187   +/-   ##
=======================================
  Coverage   97.71%   97.71%           
=======================================
  Files         455      455           
  Lines       37203    37201    -2     
=======================================
- Hits        36353    36352    -1     
+ Misses        850      849    -1     

Flag	Coverage Δ
integration	42.76% <100.00%> (-0.01%)	⬇️
unit	90.54% <0.00%> (+<0.01%)	⬆️

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[codecov-notifications]

Codecov Report

All modified and coverable lines are covered by tests ✅

✅ All tests successful. No failed tests found.

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[sentry-io]

Suspect Issues

This pull request was deployed and Sentry observed the following issues:

• ‼️ RepositoryWithoutValidBotError app.tasks.test_results.TestResultsFinisherTask View Issue

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