Docker: multi-version CUDA

[bertsky]

Implements ideas laid out in OCR-D/ocrd_all#263

• rebase CUDA image on newest Nvidia runtime
• add a fixup that installs all CUDA RT versions

[bertsky]

Strange. The CI failures do not look related at all:

_____________________ TestDecorators.test_loglevel_invalid _____________________

self = <tests.test_decorators.TestDecorators testMethod=test_loglevel_invalid>

    def test_loglevel_invalid(self):
        code, _, err = self.invoke_cli(cli_with_ocrd_loglevel, ['--log-level', 'foo'])
        assert code
>       self.assertIn('invalid choice: foo', err)
E       AssertionError: 'invalid choice: foo' not found in "Usage: python -m pytest [OPTIONS]\nTry 'python -m pytest --help' for help.\n\nError: Invalid value for '-l' / '--log-level': 'foo' is not one of 'OFF', 'ERROR', 'WARN', 'INFO', 'DEBUG', 'TRACE'.\n"

tests/test_decorators.py:55: AssertionError
____________________________ TestOcrdExif.test_png1 ____________________________

self = <tests.model.test_exif.TestOcrdExif testMethod=test_png1>

    def test_png1(self):
        with Image.open(assets.path_to('kant_aufklaerung_1784-binarized/data/OCR-D-IMG-BIN/BIN_0020.png')) as img:
            exif = OcrdExif(img)
        self.assertEqual(exif.width, 1457)
        self.assertEqual(exif.height, 2084)
>       self.assertEqual(exif.xResolution, 295)
E       AssertionError: 294 != 295

tests/model/test_exif.py:37: AssertionError

Ah, master has the same problems.

[kba]

Ah, master has the same problems.

Oh dang, I'll fix that. Something changed between Pillow 8.1.2 and 8.3.1.

Update: Is fixed in master now.