As part of the WT-10449 fix, we avoid saving the saved updates when there is no need to insert them into the history store, but this fix is causing some performance regression due to the newly added condition of checking all the updates in the update chain after the on-page update are valid or not before saving them to the saved update structure.

To fix the performance regression, check for only one update that exists after the on-page update instead of validating all the updates in the update chain before saving them to the saved update structure.