major(graphcache): remove warning and lookup fields by name rather than alias

[JoviDeCroock]

Relates to #2578
Resolves #2272

Summary

This PR does two things, removing us warning for undefined fields in optimistic mutations. Now we truely only error/warn for missing typenames and missing keys. Now we'll also leverage the fieldName rather than the fieldAlias to both invoke the optimistic mutation and look up the data from the return value.

This resulted in one failing test which was removed as part of the PR

Set of changes

• remove the warning for missing fields during optimistic, allowing for partial returns in the optimistic part
• look up fields by name rather than alias when returning data

[changeset-bot]

🦋 Changeset detected

Latest commit: 7f89df1

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@urql/exchange-graphcache	Patch

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