Sorry guys, I am just putting all possibilities here. some of them might look crazy. I have a strong feeling that there should be a way out because Immigration system is always meant for helping boosting country's economy by bringing best talent from outside. But in my case, it is acting against me considering they could not find Canadian citizen or veteran for this position.
Does Canadian embassy outside Canada has any authority to cancel my PR and issue me PRTD to enter Canada and reapply new PR card considering my job offer.
You are mixing things here:
PR card is not a PR residency itself
Also PRTD can only be issued to somebody that is PR and not somebody that is not PR anymore.
When you ask for PRTD 2 things can happen:
1. Your request is approved and PRTD will be issued
2. Your request will be declined which starts the process of PR withdrawal from you. And you will be given time to appeal against this decision.
A non PR applicant can ask only for all kind of temporary visa or to send application for PR itself (if he fits one of the category).
Also boosting Canadian economy does not translate into helping specific foreigner.
And you should not be surprised that some governmental positions are limited to certain type of applicants only (Canadian citizens or PR holders). That is the national interest, so whoever is working there is working for a place where he or she intends to stay long time and where it is in the interest of the person to do decisions favourable to Canada.