I’m not sure I’ve ever worn a pair of pants that didn’t do that. That’s just something pants do. To the point that nobody is going to see that and think you’ve got a boner. (Unless you do, of course, but even then probably only if you’re in a position that wouldn’t ordinarily produce that wrinkle/bulge or your boner is visible in a different spot than that wrinkle/bulge or something.) I wouldn’t worry about it. Even if you do some fancy tailoring to address it, I think what you’ll end up with will look worse than it would if you did nothing.