Fix HttpSensor deferrable error allowlist

[Tomeshwari-02]

What changed

HttpSensor now passes its configured response_error_codes_allowlist into HttpSensorTrigger when running in deferrable mode.

HttpSensorTrigger now serializes that allowlist and uses it when deciding whether an HTTP error should keep waiting. Non-allowlisted HTTP errors are no longer silently retried in a tight loop.

Closes #69903

Why

The synchronous HttpSensor path honored custom allowlisted status codes such as 503, but the deferrable trigger path only retried 404. This made the same sensor configuration behave differently after deferral.

Tests

• python -m py_compile providers/http/src/airflow/providers/http/sensors/http.py providers/http/src/airflow/providers/http/triggers/http.py providers/http/tests/unit/http/sensors/test_http.py providers/http/tests/unit/http/triggers/test_http.py
• git diff --check

I could not run the focused pytest file in this local shell because the Airflow test dependencies are not installed (tests_common first, then time_machine).

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