metal : add upscale

[ggerganov]

Add implementation for GGML_OP_UPSCALE used by many vision models. The implementation is not optimized, but will at least avoid unnecessary graph splits.

  UPSCALE(type=f32,ne=[512,512,3,2],scale_factor=2,mode=nearest,transpose=0): OK
  UPSCALE(type=f32,ne=[512,512,3,2],scale_factor=2,mode=nearest,transpose=1): OK
  UPSCALE(type=f32,ne=[2,5,7,11],ne_tgt=[5,7,11,13],mode=nearest): OK
  UPSCALE(type=f32,ne=[5,7,11,13],ne_tgt=[2,5,7,11],mode=nearest): OK
  UPSCALE(type=f32,ne=[512,512,3,2],scale_factor=2,mode=bilinear,transpose=0): OK
  UPSCALE(type=f32,ne=[512,512,3,2],scale_factor=2,mode=bilinear,transpose=1): OK
  UPSCALE(type=f32,ne=[2,5,7,11],ne_tgt=[5,7,11,13],mode=bilinear): OK
  UPSCALE(type=f32,ne=[5,7,11,13],ne_tgt=[2,5,7,11],mode=bilinear): OK
  UPSCALE(type=f32,ne=[512,512,3,2],scale_factor=2,mode=bicubic,transpose=0): OK
  UPSCALE(type=f32,ne=[512,512,3,2],scale_factor=2,mode=bicubic,transpose=1): OK
  UPSCALE(type=f32,ne=[2,5,7,11],ne_tgt=[5,7,11,13],mode=bicubic): OK
  UPSCALE(type=f32,ne=[5,7,11,13],ne_tgt=[2,5,7,11],mode=bicubic): OK
  UPSCALE(type=f32,ne=[512,512,3,2],scale_factor=2,mode=bilinear|antialias,transpose=0): OK
  UPSCALE(type=f32,ne=[512,512,3,2],scale_factor=2,mode=bilinear|antialias,transpose=1): OK
  UPSCALE(type=f32,ne=[2,5,7,11],ne_tgt=[5,7,11,13],mode=bilinear|antialias): OK
  UPSCALE(type=f32,ne=[5,7,11,13],ne_tgt=[2,5,7,11],mode=bilinear|antialias): OK
  UPSCALE(type=f32,ne=[2,5,7,11],ne_tgt=[5,7,11,13],mode=bilinear|align_corners): OK
  UPSCALE(type=f32,ne=[1,4,3,2],ne_tgt=[2,8,3,2],mode=bilinear|align_corners): OK
  UPSCALE(type=f32,ne=[4,1,3,2],ne_tgt=[1,1,3,2],mode=bilinear|align_corners): OK
  UPSCALE(type=f32,ne=[2,5,7,11],ne_tgt=[5,7,11,13],mode=bicubic|align_corners): OK
  UPSCALE(type=f32,ne=[1,4,3,2],ne_tgt=[2,8,3,2],mode=bicubic|align_corners): OK
  UPSCALE(type=f32,ne=[4,1,3,2],ne_tgt=[1,1,3,2],mode=bicubic|align_corners): OK
  22/22 tests passed
  Backend MTL0: OK