Handle an unmanaged exception in transacFinally we have some auto-generated documentation.search when the existing `objectType` is not supported, for the supported values of transaction.search objectType.
helping the API consumer in understanding what they should do insteadThis is useful since we have 70+ of them, and they are totally obscure to newcomers (and us, core team, lol).
The already-existing exception messages now do not suggest anymore values that exists but not supported (e.g. XACT).
Moreover, we handle an unmanaged exception in transaction.search when the existing `objectType` is not supported (e.g. XACT).
Closes T16054