[PATCH] Decrease cost of ImageWarp#warp

[taylor.smock]

The attached patch reduces memory allocations for ImageWarp#warp by ~80%. It also reduces GC by ~80% during panning (note: tested by flushing tile cache, not panning, but should be representative).

It does not improve the direct CPU cost of ImageWarp#warp.

[taylor.smock]

Ticket retargeted after milestone closed

[taylor.smock]

In 19075/josm:

Fix #23628: Decrease cost of ImageWarp#warp

This decreases overall memory allocations for ImageWarp#warp by ~80% and
decreases GC by ~80%.

This does not decrease the direct CPU cost of ImageWarp#warp.