[eas-cli] Add eas update:upload-embedded command

[gwdp]

Why

EAS Update bundle diffing can't generate patches against the JS bundle embedded in a native build, so the first OTA after install always downloads the full bundle. This command registers the embedded bundle with EAS Update so the diff worker can use it as a patch base.

Ref ENG-21033

How

• New eas update:upload-embedded command with --platform, --bundle, --manifest, --channel, and optional --build-id / --json flags
• Reads app.manifest to extract the embedded update UUID and validates it
• Resolves runtimeVersion via the same helper eas update uses
• Gets a presigned URL via getSignedEmbeddedUpdateAssetUploadSpecifications, uploads the bundle
• Calls uploadEmbeddedUpdate with the storage key + manifest fields
• Retries on EMBEDDED_UPDATE_ASSET_NOT_READY (GCS finalization race) with exponential backoff; exits immediately on EMBEDDED_UPDATE_CONFLICT

Test Plan

• yarn jest src/commands/update/__tests__/upload-embedded.test.ts src/graphql/mutations/__tests__/EmbeddedUpdateMutation-test.ts — 31 tests pass
• yarn tsc && yarn lint pass

[linear]

ENG-21033

[github-actions]

✅ Thank you for adding the changelog entry!

[gwdp]

Superseded by #3720 which has the corrected implementation (removed channelId lookup and launchAssetStorageKey, stacked with view-embedded and list-embedded).