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7b44bcd6 - build: script to update all ingest fixtures, add azure ingest fixtures (#367)

build: script to update all ingest fixtures, add azure ingest fixtures (#367) - Updates CI to install tesseract version 5.3.0 (better than 4.x in various ways incl. perf.). - Adds azure expected output fixtures for more useful reference points and as a repro for Some PDF's with scanned images return empty elements #346 . - Adds a script to regenerate ingest test fixtures that is run in an ubuntu docker container (like CI), with the same version of tesseract. See the comments in scripts/ingest-test-fixtures-update.sh for details. - Updates expected outputs with above script. - Updates individual test-ingest scripts to update expected .json output if OVERWRITE_FIXTURES=true.