The CBDEdgeTransformer tests worked on fake data structures, with a
synthetic graph, and configs that didn't match. Update them to generate
a more complete graph, with real node implementations, from real
configs.
The output graph is filtered down to instances, and the results still
functionally match the original expected test results, with some minor
additions due to using the real implementation.
The old logic for `depends_on` was to short-circuit evaluation of the
data source, but that prevented a plan and state from being recorded.
Use the (currently unused) ForcePlanRead to ensure that the plan is
recorded when the config contains `depends_on`.
This does not fix the fact that depends on does not work with data
sources, and will still produce a perpetual diff. This is only to fix
evaluation errors when an indexed data source is evaluated during
refresh.
In order to allow lazy evaluation of resource indexes, we can't index
resources immediately via GetResourceInstance. Change the evaluation to
always return whole Resources via GetResource, and index individual
instances during expression evaluation.
This will allow us to always check for invalid index errors rather than
returning an unknown value and ignoring it during apply.
