Cue: Enums with defaults generating wrong types

[spinillos]

When we have:

Enum: "A" | "B"
EnumWithDefault: *"C" | "D"

Cue parser detects A, B and D discriminators as constant references, when C was detected as reference. The constant reference is the same as reference but with a specific value.

When we use EnumWithDefault values as discriminator, being C as reference, we weren't able to detect its value, generating any/interface{} instead of the proper intermediate structure.

You can check in the test, that now we have this for all discriminator values:

"Type": {
    "Kind": "constant_ref",
    "Nullable": false,
    "ConstantReference": {
        "ReferredPkg": "grafanatest",
        "ReferredType": "Enum1",
        "ReferenceValue": "A"
    }
},

[github-actions]

Note: the diff show code changes that would be introduced by this PR to the output of the Grafana Foundation SDK codegen pipeline.

See full diff.

🔎 Changes to Grafana Foundation SDK