1211 fix airflow 3 breaking changes

[gabrielwol]

What this pull request accomplishes:

1. Updated constraints/requirements files to Airflow 3
2. Committed, Airflow-3ed and renamed some HERE dags (biggest change was to sql templates)
   • dags/queen_park_refresh.py
   • dags/rapidto_aggregation.py
   • dags/lake_shore_signal_timing_refresh.py
   • dags/congestion_aggregate_temp.py (this shows up as an edit in the diff, but it was actually a remove/add 😞)
3. Removed long unused DAGs: check_rescu, check_miovision, pull_weather, pull_interventions_dag, citywide_tti_aggregate
4. Taskflow-ify assets_pull DAG + rename to file traffic_signals_dag.py
5. Other misc import changes

See below testing:

• The DAG folder on this branch is passing ruff Airflor 3 checks without any warnings.
• The /data/airflow/dags folder is only failing on airflow.sdk.get_current_context issue, which is solved only in Airflow 3; (could not test this change in import location).

(airflow_venv) airflow@ip:~/dev_scripts/_/dags$ git status
On branch 1211-fix-airflow-3-breaking-changes
Your branch is up to date with 'origin/1211-fix-airflow-3-breaking-changes'.

nothing to commit, working tree clean
(airflow_venv) airflow@ip:~/dev_scripts/_/dags$ ruff check . --select AIR301 --preview
All checks passed!
(airflow_venv) airflow@ip:~/dev_scripts/_/dags$ cd ~/dags
(airflow_venv) airflow@ip:~/dags$ ruff check . --select AIR301 --preview
replicators.py:49:27: AIR301 `airflow.operators.python.get_current_context` is removed in Airflow 3.0
   |
47 |             def check_tbl_not_empty(conn_id, tables, tbl_index, **context):
48 |                 #name mapped task
49 |                 context = get_current_context()
   |                           ^^^^^^^^^^^^^^^^^^^ AIR301
50 |                 context["dest_table_name"] = tables[tbl_index]
   |
   = help: Use `airflow.sdk.get_current_context` instead

vz_google_sheets.py:89:19: AIR301 `airflow.operators.python.get_current_context` is removed in Airflow 3.0
   |
87 |         #get name for mapped task 
88 |         from airflow.operators.python import get_current_context
89 |         context = get_current_context()
   |                   ^^^^^^^^^^^^^^^^^^^ AIR301
90 |         context["task_year"] = spreadsheet["year"]
   |
   = help: Use `airflow.sdk.get_current_context` instead

wys_pull.py:182:23: AIR301 `airflow.operators.python.get_current_context` is removed in Airflow 3.0
    |
180 |         def read_google_sheet(ward, **context):
181 |             #name mapped task
182 |             context = get_current_context()
    |                       ^^^^^^^^^^^^^^^^^^^ AIR301
183 |             context["ward_no"] = f"ward_{ward[3]}"
    |
    = help: Use `airflow.sdk.get_current_context` instead

Found 3 errors.

Issue(s) this solves:

What, in particular, needs to reviewed:

What needs to be done by a sysadmin after this PR is merged

E.g.: these tables need to be migrated/created in the production schema.