[Placement Group] Export bundle reservation check method only once. (#11153)
[Placement Group] Export bundle reservation check method only once. (#11153)

* Export bundle reservation check method only once.

* Addressed code review.
pcmoritz/ray-1,pcmoritz/ray-1,ray-project/ray,ray-project/ray,ray-project/ray,richardliaw/ray,pcmoritz/ray-1,ray-project/ray,ray-project/ray,richardliaw/ray,richardliaw/ray,pcmoritz/ray-1,richardliaw/ray,richardliaw/ray,ray-project/ray,pcmoritz/ray-1,pcmoritz/ray-1,richardliaw/ray,ray-project/ray,ray-project/ray,pcmoritz/ray-1,richardliaw/ray,pcmoritz/ray-1,richardliaw/ray