we discussed this yesterday in the General Blue Jays thread. You're late to the party
But, to answer the question you posed, no it wont alter the Jays trade deadline plans. The front office cannot count on Manoah contributing anything this season, so his rehab starting date is a non-factor. Should he eventually gear up for a starter's pitch count, him even getting back up to the big squad would likely necessitate an injury to a current starter, or him being used as a reliever, which ... just wouldn't make sense when they would want as many innings as he could deliver in the last month or so of the season for his own injury recovery. Chances are, that would occur in AAA until their season is over.