Let's remove "Trump" from the equation.
You're wondering if one country could invade a second country, for the purposes of invading a third countries embassy.
While that's physically possible, the international ramifications would be immense. It's one thing to bomb weddings in Yemen. It's an entirely different prospect to violate diplomatic immunity on an allies soil.
I mean that's exactly the kind of thing I would expect from Trump. I don't know if it is technically possible, and if he would find people to do it.