CLI: native collections support

[josephjclark]

No more do users need to add a collections adaptor to workflow.yaml!

Now the CLI, just like the worker, will detect calls to the collections API and configure the workflow and configuration to allow collections to Just Work ™️

Fixes #841

UX

You can now execute an expression or workflow like this:

 openfn tmp/collections.js -a common --collections-endpoint https://app.staging.openfn.org --api-key $OPENFN_API_KEY

You can use OPENFN_API_KEY to set your PAT including using a .env file.

Still To Do

This basically works but I'd still like to look at:

• integration tests with the CLI. A little harder to set up because of how collections works. I notice also we have no integration tests on openfn collections. Not sure how much I want to do about this - I might just roll with it, but it's got to be worth half an hour's time to try and set it up
• No integration or testing with Project. Obviously execute-from-project isn't ready yet and can build on top of this. I'm not sure what, if anything, Project needs to do to support collections yet.
• I need to raise a PR against docs with updates. This is a significant simplification.

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[josephjclark]

TODO I should really set a helper in the CLI for this - just pass the env var name. Also need to apply this to other options