ref(flags): Remove organizations:uptime-response-capture

[wedamija]

Default-removable flag (default=True). Remove the flag registration and flag check, making uptime response capture on failure unconditional.

[github-actions]

Backend Test Failures

Failures on 4553cc2 in this run:

tests/symbolicator/test_minidump_full.py::SymbolicatorMinidumpIntegrationTest::test_full_minidump_invalid_extra — log

[gw1] linux -- Python 3.13.1 /home/runner/work/sentry/sentry/.venv/bin/python3
tests/symbolicator/test_minidump_full.py:139: in test_full_minidump_invalid_extra
    event = self.post_and_retrieve_minidump(
src/sentry/testutils/relay.py:127: in post_and_retrieve_minidump
    assert resp.ok
E   assert False
E    +  where False = <Response [503]>.ok

tests/symbolicator/test_minidump_full.py::SymbolicatorMinidumpIntegrationTest::test_full_minidump_json_extra — log

[gw0] linux -- Python 3.13.1 /home/runner/work/sentry/sentry/.venv/bin/python3
tests/symbolicator/test_minidump_full.py:124: in test_full_minidump_json_extra
    event = self.post_and_retrieve_minidump(
src/sentry/testutils/relay.py:130: in post_and_retrieve_minidump
    event = self.wait_for_ingest_consumer(
src/sentry/testutils/pytest/kafka.py:182: in waiter
    consumer._run_once()
.venv/lib/python3.13/site-packages/arroyo/processing/processor.py:452: in _run_once
    self.__message = self.__consumer.poll(timeout=1.0)
                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
.venv/lib/python3.13/site-packages/arroyo/backends/kafka/consumer.py:509: in poll
    raise ConsumerError(str(error))
E   arroyo.errors.ConsumerError: KafkaError{code=_MAX_POLL_EXCEEDED,val=-147,str="Application maximum poll interval (300000ms) exceeded by 209ms"}