Deleting a service_dynamic_snippet_content resource has no effect even if manage_snippets is true

[landrew57]

Current Behaviour

The service_dynamic_snippet_content resource cannot be deleted. The code does not do anything if in the delete scenario:

terraform-provider-fastly/fastly/resource_fastly_service_dynamic_snippet_content.go

Lines 123 to 127 in 2f8351b

	func resourceServiceDynamicSnippetDelete(_ context.Context, d *schema.ResourceData, _ any) diag.Diagnostics {
	// Dynamic snippet content cannot be deleted. Removing from state only
	d.SetId("")
	return nil
	}

Expected Behaviour

The contents of the dynamic snippet are deleted if manage_snippets is set to true. If manage_snippets is false it makes sense to have delete as a noop.

Other comments

I have some code that I am testing locally. I can write tests and raise a PR if this sounds like desired behaviour.