chore: remove previous code

note: since the NEW_TA_TASKS feature flag is not enabled for any repos
we're safe to remove the ta_* tasks since they aren't being queued up
anywhere in the old version of the code anyways

this commit removes the TA finisher tasks and replaces the call to
queue those up in the upload task with a call to queue up a separate
chain of processor tasks with the new_impl kwarg set to True. We can
pass this extra kwarg because the processor task has **kwargs which
makes it so even old versions of the code are compatible with this
version of the upload task

until we have the new implementation of the processor task deployed
we should not enable NEW_TA_TASKS since it will possibly cause
duplicate TA uploads to be processed

tasks/__init__.py

@@ -49,8 +49,6 @@
 from tasks.sync_repo_languages_gql import sync_repo_languages_gql_task
 from tasks.sync_repos import sync_repos_task
 from tasks.sync_teams import sync_teams_task
-from tasks.ta_finisher import ta_finisher_task
-from tasks.ta_processor import ta_processor_task
 from tasks.test_results_finisher import test_results_finisher_task
 from tasks.test_results_processor import test_results_processor_task
 from tasks.timeseries_backfill import (