Generatlize Sequence, Set to all iterables in serializer

[sl0thentr0py]

closes #4606

[codecov]

❌ 32 Tests Failed:

Tests completed	Failed	Passed	Skipped
22963	32	22931	2100

View the top 3 failed test(s) by shortest run time

tests.integrations.django.test_basic::test_rest_framework_basic[application/json-1-rest_framework_exc]

Stack Traces | 0.08s run time

.../integrations/django/test_basic.py:913: in test_rest_framework_basic
    assert event["request"]["data"] == body
E   KeyError: 'data'

tests.integrations.django.test_basic::test_rest_framework_basic[application/json-foo-rest_framework_exc]

Stack Traces | 0.081s run time

.../integrations/django/test_basic.py:913: in test_rest_framework_basic
    assert event["request"]["data"] == body
E   KeyError: 'data'

tests.integrations.django.test_basic::test_rest_framework_basic[application/x-www-form-urlencoded-body3-rest_framework_exc]

Stack Traces | 0.084s run time

.../integrations/django/test_basic.py:913: in test_rest_framework_basic
    assert event["request"]["data"] == body
E   KeyError: 'data'

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[sl0thentr0py]

WSGIRequest itself has an __iter__ so this is not a good idea, closing. Will make a less general solution.

https://github.com/django/django/blob/22506b2c162b34c4c45f748cf11ede75824a40cd/django/http/request.py#L477-L478