[test] Include uniqueSuspenders in Suspense tree snapshots

[everettbu]

Mirror of facebook/react#35736
Original author: eps1lon

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This field is important to show only boundaries that can have their fallback shown so we should include it in tests.

This change doesn't imply the values in the existing tests are correct.

[greptile-apps]

Greptile Overview

Greptile Summary

This PR updates DevTools test snapshots so printed Suspense tree nodes include a uniqueSuspenders={...} attribute (derived from SuspenseNode.hasUniqueSuspenders). The only production change is in packages/react-devtools-shared/src/devtools/utils.js, where printStore’s Suspense snapshot output now prints this field; the rest of the changes are inline snapshot updates across Store/TreeContext/Profiler commit-tree tests.

Confidence Score: 5/5

• This PR is safe to merge with minimal risk.
• Changes are limited to snapshot formatting in test utilities plus corresponding inline snapshot updates; no behavioral changes to DevTools runtime logic beyond test output formatting.
• No files require special attention

Important Files Changed

Filename	Overview
packages/react-devtools-shared/src/devtools/utils.js	Updates Suspense snapshot printer to include uniqueSuspenders based on SuspenseNode.hasUniqueSuspenders.
packages/react-devtools-shared/src/tests/profilingCommitTreeBuilder-test.js	Adjusts inline snapshots to include uniqueSuspenders={...} on printed Suspense nodes.
packages/react-devtools-shared/src/tests/store-test.js	Updates Store-related inline snapshots for Suspense tree printing to include uniqueSuspenders={...}.
packages/react-devtools-shared/src/tests/storeComponentFilters-test.js	Updates component filter tests’ Suspense tree snapshots to include uniqueSuspenders={...} values.
packages/react-devtools-shared/src/tests/treeContext-test.js	Updates TreeContext-related inline snapshots to print Suspense nodes with uniqueSuspenders={...}.

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[everettbu]

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