Make apiVersion optional for listSubscriptions invoke, default to 2022-12-01

[Copilot]

apiVersion was a required input for the listSubscriptions invoke. Since there's a single sensible default (2022-12-01), it should be optional.

Changes

• Schema (provider/pkg/gen/schema.go): Removed apiVersion from Required, updated description to document default
• Runtime (provider/pkg/provider/provider.go): Default to "2022-12-01" when apiVersion is absent/empty
• Unit test: TestInvokeListSubscriptionsDefaultApiVersion — verifies default is applied
• Integration test (examples/examples_test.go): TestListSubscriptionsInvoke — YAML program that invokes listSubscriptions without arguments and outputs the first subscription ID
• SDK regen: Node.js, Python, .NET SDKs regenerated with optional apiVersion

Usage

variables:
  subscriptions:
    fn::invoke:
      function: azure-native:authorization:listSubscriptions
outputs:
  firstSubscriptionId: ${subscriptions.value[0].subscriptionId}

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[Zaid-Ajaj]

Tested runtime implementation locally! Generated schema and code look fine

[pulumi-bot]

This PR has been shipped in release v3.15.0.