Build-bot: skip release:web release:android
Relates-to: #16254
Relates-to: #16313
Noting that similar issues to those fixed by #16313 have occurred in other gesture-related contexts, it seems wise to implement the same sort of fix for all gesture types - perhaps the Android WebView has its own circumstances where similar "reference replacements" may occur and throw off our internal key-matching logic.
- Drops the `Suggestion.transformId` field in favor of just reusing `.transform.id`
- Updates documentation on .transform.id as a unique identifier of the transition,
not specific to a single Transform.
Does not modify the `.transform` or `.id` properties because we've been publishing
lexical model types, and that would change the public model API.
Build-bot: skip build:web
Test-bot: skip
