As I suspected, the language about using force to execute a warrant is standard boilerplate on all warrant forms. Or at least that's what the FBI claims (and it seems like a simple thing to check.)
One can still point to this and say that Merrick Garland should never have issued this warrant, given that a possible and anticipated consequence was using deadly force against the once and future president (though they executed the warrant when Trump was not home), but it's not the case that anyone issued a special Assassination Order for Trump.
If the FBI's claim turns out to be false, I'll note that. But like I said, this seems easy enough to disprove, if it is false.