Allow for http function calls to provide objects

[hneale-jc]

What this PR does / why we need it:

For the https://github.com/serverlessworkflow/specification/blob/0.9.x/specification.md#using-functions-for-http-service-invocations spec. Function operations for the http type need an map[string]interface{}. This PR instead makes the operator any and adds the http type into the function types set.

Special notes for reviewers:

This maybe a breaking change

Additional information (if needed):

[ricardozanini]

Hi @hneale-jc do you have a specific request?

[hneale-jc]

@ricardozanini no sorry. I didn't mean to open a PR. I was forking to add http support based on the sepc: https://github.com/serverlessworkflow/specification/blob/0.9.x/specification.md#using-functions-for-http-service-invocations as it'll only work with rest/openapi which requires a swagger endpoint. Just needed support for curl. The existing struct only allowed for a string.

[ricardozanini]

@hneale-jc Oh, I see, so are you using 0.8 spec version? If so, you can propose a patch to 2.x and I will release it.

[hneale-jc]

So this is currently on the 2.x branch. I imagine this will be a breaking change though? As downstream clients will have to cast from any to the string to get their operation. Let me know your thoughts and then I can squash this PR

[ricardozanini]

@hneale-jc I think we need a new main branch based on 2.x so we keep 2.x on 0.8. I'll create a 2.5.x branch, and you can send your PR there. Do you mind? So I'll release a 2.5.0 based on 0.9, and you can work on this stream. I'll keep the 2.x in 2.4.x.