Can the wing stagnation point be bled off and used for laminar flow control?
No.

Slow-moving also means low mass flow. In order to re-energize the boundary layer, the air has to move fast, meaning high mass flow. Also, speed means reduced pressure, so the stagnation pressure is not sufficient to produce that desired high-energy flow.

Also, contamination (bugs, ice) accretes close to the stagnation point. Ideally, in order to remove contamination, blowing would have to happen across the stagnation point. For that, blowing pressure needs to be higher than stagnation pressure.

The only use of stagnation pressure for boundary layer control is for tripping by blowing perpendicularly to the surface into the boundary layer. This works with low mass flows already.