Remove the unused "annotations" variable for Local Builds

[falahat]

Description

This was read from Universal Maker's output but we weren't actually piping it anywhere.

Scenarios Tested

Sample Commands

[gemini-code-assist]

Code Review

This pull request removes the annotations and metadata fields from the App Hosting local build workflow, including updates to the AppHostingBuildOutput and LocalBuild interfaces and the removal of associated logic and unit test assertions. Reviewer feedback recommends updating the JSDoc for processUniversalMakerOutput and localBuild to ensure the documentation accurately reflects the removal of these fields.

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src/apphosting/localbuilds.ts (143-146)

The metadata field has been removed from the return type of processUniversalMakerOutput. The JSDoc for this function (line 114) should be updated to reflect that it no longer parses or returns metadata.

src/apphosting/localbuilds.ts (205)

The annotations field has been removed from the return type of localBuild. The JSDoc for this function (lines 187-191) should be updated to remove the reference to annotations and the mention of returning metadata (line 183) to keep the documentation accurate.