feat(resource-link): Add Service Resource commands

[awilliams-fastly]

https://developer.fastly.com/reference/api/services/resource/

This adds a resource-link sub-command which has associated create, delete, list, and update commands.

USAGE
  fastly resource-link <command> [<args> ...]

Manipulate Fastly service resource links

COMMANDS
  resource-link
  create    Create a Fastly service resource link
  delete    Delete a resource link for a Fastly service version
  describe  Show detailed information about a Fastly service resource link
  list      List all resource links for a Fastly service version
  update    Update a resource link for a Fastly service version

SEE ALSO
  https://developer.fastly.com/reference/cli/resource-link/

Upgraded github.com/fastly/go-fastly/v7 v7.1.0 => v7.2.0

Some of the names in the API may be confusing. I've done my best to add clarification whenever possible. Specifically:

• A resource, as named by the API, is truly a link between a service and a resource (e.g. an Object Store), not the resource itself. I've tried to use "resource link" wherever appropriate, as also used by the API docs:

  A resource represents a link between a resource type and a service version.

  Update 1d2eb20: uses a different base command name resource-link.

• In some places, the API mixes id and resource_id which both refer to the ID of the resource link, and not the resource itself. I've changed this so that id always refers the resource link, and resource_id to the linked to object. Fixed by resource: Improve parameter naming; support JSON encode go-fastly#394

• It's possible to provide a resource link name. If set, this is an alias for the resource. Otherwise, whatever name was used when creating the resource itself will be the name to reference from the service for the resource. I've added to the description that this is an alias. See this code comment: https://github.com/fastly/go-fastly/blob/ef4694a59779f202d8ea630b41333eb2b76969e8/fastly/resource.go#L86-L88

Keeping this as a draft until a new go-fastly release is created that incorporates fastly/go-fastly#394.

[joeshaw]

Bikeshedding on the command name, I wonder if service-link or resource-link are clearer? The resource itself (object store, secret store, etc.) is already created. This is linking it to a particular service version.

[Integralist]

@joeshaw to be honest for me either the current service-resource or your service-link works in my mind, and that's because it all depends on how I think about the command 'in my head' at the time of using the command 😬

COMMAND	MY INTERNAL UNDERSTANDING WHEN SEEING THE COMMAND
service-resource	I have a resource I want to attach to my service
service-link	I want to link something up to my service

I'm not sure which 'description' I'm more likely to say in my head when looking at the command.

At a push my gut says service-link but then I recall an internal document from Patrick saying why "link" was a bad name and that's why they changed from "Links API" to "Resource API".

[awilliams-fastly]

The UI will eventually be updated with a top-level Resources tab. That page will contain a list of resources (e.g. Object Stores), with a Link to services button alongside each resource.

For this reason, I think that resource-link may best align with the UI's verbiage.

[Integralist]

CI is failing with some weird error 🤔

[Integralist]

LGTM 👍🏻

[awilliams-fastly]

CI is failing with some weird error 🤔

Not sure what that was from. But a re-run of the failing CI job passed, and staticcheck also passes for me locally.