Update to Aspire 13.3

[eerhardt]

Also bump versions of other packages to latest.

[Copilot]

Pull request overview

Updates the repo’s .NET Aspire/AppHost tooling to Aspire 13.3 and refreshes several centrally-managed NuGet package versions, along with related NuGet/OpenAPI configuration changes.

Changes:

• Bump Aspire.AppHost.Sdk from 13.2.0 to 13.3.0 in the AppHost and functional test AppHosts.
• Update central package versions in Directory.Packages.props (Aspire, Microsoft.Extensions, Asp.Versioning, OpenTelemetry, etc.).
• Add Aspire tooling config (aspire.config.json) and adjust NuGet configuration (extra package source + globalPackagesFolder); OpenAPI JSONs update api-version schema formatting.

Reviewed changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
tests/Ordering.FunctionalTests/Ordering.FunctionalTests.csproj	Bumps Aspire.AppHost.Sdk to 13.3.0 for functional test AppHost.
tests/Catalog.FunctionalTests/Catalog.FunctionalTests.csproj	Bumps Aspire.AppHost.Sdk to 13.3.0 for functional test AppHost.
src/eShop.AppHost/eShop.AppHost.csproj	Bumps Aspire.AppHost.Sdk to 13.3.0 for the main AppHost.
src/Catalog.API/Catalog.API_v2.json	OpenAPI schema tweak for api-version parameter (example → enum).
src/Catalog.API/Catalog.API.json	OpenAPI schema tweak for api-version parameter (example → enum).
nuget.config	Adds an Aspire feed + package source mapping; sets globalPackagesFolder.
aspire.config.json	Adds Aspire app host path configuration.
Directory.Packages.props	Central version bumps (Aspire/Microsoft.Extensions/Asp.Versioning/OpenTelemetry/etc.).

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