[CORE-1741] use forked pytesseract to reduce calls to tesseract (#1298)
This PR resolves
[CORE-1741](https://unstructured-ai.atlassian.net/browse/CORE-1741) by
using a new function `pytesseract.run_and_get_multiple_output`, see
forked repo for more details:
https://github.com/Unstructured-IO/unstructured.pytesseract/releases/tag/0.3.11-dev1
This reduces the call to `tesseract` by half per page of PDF/image
during partition, roughly reducing the runtime by 48%.
The new function is in forked `unstructured.pytesseract`. A PR has been
made to the upstream repo and once that is merged we should switch to
the up stream version. For now we add a new dependency:
`unstructured.pytesseract`.
## testing
Existing unit tests should serve as tests to the new function.
To demonstrate the changes in performance:
- checkout main
- run `./scripts/performance/profile.sh` and select `ocr_only` strategy,
using the 10th document (16 page layout paper in pdf format)
- examine the speedscope profile or time profile in flamegraph -> should
see two dominant time spenders are `pytesseract.image_to_text` and
`pytesseract.image_to_boxes`, with both about the same total time (see
attached first image)
- checkout this branch
- run the same `profile.sh` with the same options
- examine the profile again and this time should notice 1) total runtime
is reduced by more than 40%; 2) only
`unstructured_pytesseract.run_and_get_multiple_output` is the top time
spender and its total time is about the same as either the
`pytesseract.image_to_text` or `pytesseract.image_to_boxes` time (see
second image below)


[CORE-1741]:
https://unstructured-ai.atlassian.net/browse/CORE-1741?atlOrigin=eyJpIjoiNWRkNTljNzYxNjVmNDY3MDlhMDU5Y2ZhYzA5YTRkZjUiLCJwIjoiZ2l0aHViLWNvbS1KU1cifQ
---------
Co-authored-by: Benjamin Torres <benjats07@users.noreply.github.com>
Co-authored-by: cragwolfe <crag@unstructured.io>