feat: add "auto" language for TesseractOcr (#759)

* Add "auto" language for TesseractOcr

Signed-off-by: Pavel Denisov <pavel.denisov@iais.fraunhofer.de>

* Add tesseract-ocr-script-latn installation for the "auto" language

Signed-off-by: Pavel Denisov <pavel.denisov@iais.fraunhofer.de>

* Modify "auto" language in TesseractOcr to initialize the script readers lazily

Signed-off-by: Pavel Denisov <pavel.denisov@iais.fraunhofer.de>

* Finalize script readers

Signed-off-by: Pavel Denisov <pavel.denisov@iais.fraunhofer.de>

* Fix script models prefix for Linux

Signed-off-by: Pavel Denisov <pavel.denisov@iais.fraunhofer.de>

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Signed-off-by: Pavel Denisov <pavel.denisov@iais.fraunhofer.de>