fix(odk): use payload filter with meta.instanceID

[obdulia-losantos]

Instead of using the instanceID filter why not the new payload__XXX one.

With this we make kernel more ODK agnostic that I think it's a good thing 😇

Hey! Did you know that we already reached 96% test coverage level in kernel? 😉

Name                                      Stmts   Miss Branch BrPart  Cover   Missing
-------------------------------------------------------------------------------------
aether/__init__.py                            1      0      0      0   100%
aether/kernel/__init__.py                     1      0      0      0   100%
aether/kernel/admin.py                       35      0      0      0   100%
aether/kernel/api/__init__.py                 0      0      0      0   100%
aether/kernel/api/avro_tools.py             264      2    156      2    99%   354, 395, 353->354, 394->395
aether/kernel/api/constants.py                7      0      0      0   100%
aether/kernel/api/exporter.py               202      0     80      0   100%
aether/kernel/api/filters.py                 96      0     20      0   100%
aether/kernel/api/forms.py                   17      0      2      0   100%
aether/kernel/api/mapping_validation.py      50      0     16      0   100%
aether/kernel/api/models.py                 213      0     30      0   100%
aether/kernel/api/project_artefacts.py      120      0     57      0   100%
aether/kernel/api/serializers.py            180     15     24      8    88%   200-201, 322, 326-327, 339-344, 350, 353, 363-364, 367-368, 431, 319->321, 321->322, 335->337, 337->339, 347->350, 352->353, 354->356, 430->431
aether/kernel/api/urls.py                    15      0      0      0   100%
aether/kernel/api/utils.py                  341     40    160     10    87%   251, 255-257, 341, 344, 348-351, 365-386, 395-396, 432, 461-475, 518, 594-598, 601-602, 250->251, 338->341, 343->344, 345->348, 394->395, 429->432, 459->461, 515->518, 591->594, 600->601
aether/kernel/api/validators.py              39      0     18      0   100%
aether/kernel/api/views.py                  151      0     24      0   100%
aether/kernel/apps.py                         4      0      0      0   100%
aether/kernel/urls.py                         5      0      0      0   100%
-------------------------------------------------------------------------------------
TOTAL                                      1741     57    587     20    96%

[quesebifurcan]

Looks good to me. I kept the instanceID filter there so as not to break any scripts depending on it, but if we can verify that no one is using it, I'm very much in favor of this simplification.

[admbtlr]

🎉 for the payload filter, btw - I've just been using it on the microcensus data

[obdulia-losantos]

The instance filter was only used in the ODK submission view