feat(parameters): Allow settings boto3.client() arguments

Is your feature request related to a problem? Please describe. I’m using VPC endpoints with private DNS disabled, so I have to pass endpoint_url to boto3.client to use the endpoint-specific host name. I am not able to use parameters because this is not supported.

Describe the solution you’d like Perhaps allowing to pass additional keyword arguments to the client method.

[heitorlessa]

Releasing it first thing tomorrow morning @gshpychka

[heitorlessa]

Thanks everyone! The more I look into the Parameters utility the more I find we should’ve accepted a whole boto Client only. It would simplify our logic to maintain it, and also make it easier for customers to stub for unit testing, use snapshot testing with placebo, or in this case pass a different endpoint_url.

We won’t be able to add this now due to our pause and bandwidth. I do believe there are other customers who will eventually be blocked by this too, so if anyone could create a PR to accept a Client I’ll happily work with you to get it merged as an exception.

Note: I’m following this issue for boto to eventually add support to endpoint_url via environment variables as it’s a common ask.