OpenCL: refactor clip_rotate_bilinear into interpolation_compute_pixel_bilinear_4f
OpenCL: refactor clip_rotate_bicubic into interpolation_compute_pixel_bicubic_4f
OpenCL: refactor clip_rotate_lanczos2 into interpolation_compute_pixel_lanczos2_4f
OpenCL: refactor clip_rotate_lanczos3 into interpolation_compute_pixel_lanczos3_4f
OpenCL: refactor clip_rotate src pixel coord calculation into function