mtmd: deepseek-ocr v1 multi-tile (#24717)

• mtmd: deepseek-ocr v1 multi-tile dynamic resolution + unified image-preprocessors for both versions (ds-ocr v1 and v2)

• remove hacky API

• fuse row into a long image

• almost working

• adapt to new preprocessor api

• rm debugging printf

• improve

• mtmd: dsocr-tiles fixes (#25481)

• ds-ocr img-preproc fuse_row tile-drop fix for multi rows and columns images

• mtmd drop the duplicate redundant img_end

• deepseekocr graph simplify CLS broadcast cleanup

• test-deepseek-ocr: relax v1 single-view tolerance; drop trailing prompt space; make DRY opt-in and n_predict model-specific (#25486)

Co-authored-by: Saba Fallah [email protected] Co-authored-by: Saba Fallah [email protected]