fix get_template_context

[satayyeb]

refs #9209
Fixes #9209

Description

According to this documentation, the RequestContext should have status_code and details keys. so I changed the get_template_context function to set these keys in the context.

[sevdog]

A test to ensure the correct behaviour will complete this PR, I wrote one in #9209 which could be added.

[codespearhead]

Also, can you link this PR to that issue ( #9209 )?

[sevdog]

@satayyeb could you please add the testcase from #9209 to ensure that this change resolves that issue?

class StaticHTMLRendererErrorTests(URLPatternsTestCase):
    class StaticErrorView(APIView):
        renderer_classes = (StaticHTMLRenderer,)

        def get(self, request, **kwargs):
            raise exceptions.ValidationError('error')

    urlpatterns = [path('error', StaticErrorView.as_view())]

    def test_statis_renderer_with_api_exception(self):
        response = self.client.get('/error')  # this line raise a TypeError
        assert response.status_code == 400

The test is important to ensure that we do not fell into the same issue again.

[auvipy]

replaced by another PR with tests. thanks for the initial fix!