remove passing of size to stream clone and repack

[jmitrevs]

Description

This removes the unused feature of clone stream and repack for oneAPI. Generally with oneAPI we don't support reading in multiple inputs as one.

While looking at the changes I found the bug: stream6 was written twice, with the data of stream 6 and stream7, while no data was sent to stream7. That fix has been incorporated here. It is easy to incorporate that fix in the master branch directly, but I think these other changes are worth having.

Type of change

• Bug fix (non-breaking change that fixes an issue)
• Other - remove unused feature

Tests

The bug fix should make test_multi_fix work for oneAPI, and other pytests should not break because of the other changes.

Checklist

• I have read the guidelines for contributing.
• I have commented my code, particularly in hard-to-understand areas.
• I have made corresponding changes to the documentation.
• My changes generate no new warnings.
• I have installed and run pre-commit on the files I edited or added.
• I have added tests that prove my fix is effective or that my feature works.

[JanFSchulte]

The latest changes improved things and seem to have actually fixed the stuck stream cloning test. But there are 2 remaining stuck tests, one in the ``test_pytorch_apitest and one intest_transpose_concat`. Also, now that the stream clone test pass, it reveals that all tests of `test_time_distributed` fail, but that is unrelated to this PR.

[jmitrevs]

The test_view test seems to hang. Will investigate.

[jmitrevs]

It turns out we do need to pass the size after all. The fixes discovered when working on this PR are now in #1354.