Fix and reorganize stashed ops that wait for a summary

[dannimad]

Some tests among stashedOps.spec.ts need to wait for a summary in order to fall into its test scenario. There was some missing configuration on them:

• ensureSynchonized should be called before summarizing to ensure that it summaries all changes up to that point.
• When created the provider via getTestObjectProvider, pass in option { syncSummarizer: true } so that ensureSynchonized will sync summarizer clients.
• explicitly load summarizers from the snapshot generated by previous summarizers by specifying the version of that snapshot

Besides those changes, I made some reorganization to these tests since added config is necessary only for tests that wait for a summary so I separated them into a different file and move some functions to a utils file well.

Some of these tests are currently failing in ODSP and so I'll head up OCE in case they keep failing after this PR is merged. If this approach work, I'll use it for refresh snapshot tests that are currently failing for what I suspect the same reason.

[Copilot]

Copilot reviewed 5 out of 5 changed files in this pull request and generated 1 comment.

Comments suppressed due to low confidence (2)

packages/test/test-end-to-end-tests/src/test/offline/offlineTestsUtils.ts:43

• [nitpick] The magic number 30 should be defined as a constant or passed as a parameter for better readability and maintainability.

const lots = 30;

packages/test/test-end-to-end-tests/src/test/offline/containerDirtyFlag.spec.ts:31

• Ensure that map2 is properly initialized before using it. Add a check to verify that map2 is not null or undefined.

const map2 = await dataStore2.getSharedObject<ISharedMap>(mapId);

[Copilot]

The request parameter should be validated to ensure it is not null or undefined before being used.