[cli] Add E2E sample upgrade tests for aspire-samples#15421

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mitchdenny wants to merge 14 commits intomainfrom

feature/sample-upgrade-e2e-tests

Commits on Mar 20, 2026

[cli] Add E2E sample upgrade tests for aspire-samples

Mitch Denny
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Fix aspire update prompt handling and add upgrade verification

Mitch Denny
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Use explicit PR channel for aspire update to ensure PR packages are used

Mitch Denny
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Pre-create NuGet.config with PR hive source for aspire update apply phase

Mitch Denny
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Use two-phase upgrade: aspire update + manual PR version fixup

Mitch Denny
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Fix PR version detection from hive packages

Mitch Denny
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Remove unnecessary dotnet restore step from UpgradeToPrVersionAsync

Mitch Denny
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Mount working directory to enable direct file assertions

Mitch Denny
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Use --channel pr-{N} for direct PR version upgrade

Mitch Denny
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Use --channel with fallback sed for package references

Mitch Denny
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Fix aspire update --channel to pass NuGet config to dotnet package add

Mitch Denny
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Skip restore during individual package adds for explicit channels

Mitch Denny
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Add Playwright dashboard verification and host networking to sample upgrade tests

Mitch Denny
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Simplify CLI changes: remove AddPackageAsync overload, use --no-restore only

Mitch Denny
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