Add filter for cognito identity fields

[dfangl]

This PR adds a hacky filter, to the cognito_identity field of the lambda context. This will only allow correct values to be passed into it.

Once a real fix is available (by rethinking and redoing the localstack.services.apigateway.apigateway_listener.invoke_rest_api_integration_backend and localstack.services.apigateway.helpers.get_event_request_context methods @whummer @calvernaz ) so that this part:

        "identity": {
            "accountId": account_id,
            "sourceIp": source_ip,
            "userAgent": headers.get("User-Agent"),
        },

does not show up in the cognito_identity part of the lambda context, this PR should be reverted.

Until then, it will only allow "cognitoIdentityId" and "cognitoIdentityPoolId" as directory keys for cognito_identity.

This should help fixing #5783 .

Test for apigateway - rust lambda integration added to prevent further regressions.

[dominikschubert]

It's a good bad hack in the meantime though 😄

[dominikschubert]

Will leave the approval to the others, but from my side I don't see an issue with having it in there as a temporary fix 👍

[github-actions]

LocalStack integration with Pro

       3 files  ±  0         3 suites  ±0   1h 1m 58s ⏱️ + 1m 15s
1 004 tests +  1     963 ✔️ +  1  41 💤 ±0  0 ❌ ±0 
1 298 runs  +71  1 228 ✔️ +70  70 💤 +1  0 ❌ ±0 

Results for commit 2b4e9c2. ± Comparison against base commit 0b038d1.

♻️ This comment has been updated with latest results.

[calvernaz]

I think it's an ok fix, the request context that is being to the event is being wrongly passed to the context of the lambda. I'll create an issue to complete the fix, by correctly passing the necessary information to build the content object.

[whummer]

Great catch and nice fix @dfangl ! 👍

[dfangl]

Due to a lot of lambda integrations tested in there, I added test_apigateway.py to the tests executed for different lambda executors (new test is also in there). At some point we have to find a solution for this which scales better (pytest marks, decide on used fixtures etc).

[thrau]

LGTM 👍

[alexrashed]

LGTM 🚀