Patch UCX to add CUDA support at runtime

[Micket]

(created using eb --new-pr)

[Micket]

So, I think this works. ucx_info manages to find and report on CUDA stuff.

But, there are some details to sort out when it comes to building the additional UCX-plugins; I would like them link to the existing libuct.so etc. libraries. Right now, I hackishly install the plugins. Alternatively, we can just install copies of those libraries, they should hopefully be identical anyway.

[boegel]

@Micket Do you think it's worth implementing a custom easyblock for this, where we can check the output produced by ucx_infoa bit more thoroughly?

This easyconfig looks complex enough to warrant that, I think...

[Micket]

Sure, though it's mostly just the same as UCX. We could probably automatically populate EB_xxx_MODULES here.

The biggest issue is

1. Gotta test to see if it actually works for transferring data. I need 2 nodes to test and my cluster is a bit booked up at the moment.
2. The hacky way I install just the modules right now is not good. I would really need to rework this. Maybe even requiring a patch to just build the plugins and not involve any other linking shenanigans. I'm not to familiar with how to hack this into libtool/autohell stuff going on here. I really hate autotools...

[akesandgren]

Use strncpy, strncat, strncat here instead, then you can drop stdio and stdlib and do string.h instead.

[akesandgren]

This one no longer need the original UCX nor the patch for dynamic modules.

[boegelbot]

@Micket: Tests failed in GitHub Actions, see https://github.com/easybuilders/easybuild-easyconfigs/actions/runs/885348992
Output from first failing test suite run:

Found 12227 easyconfigs...
Failed to determine merge base (ec: 1, output: ''), falling back to specifying target branch develop
FAIL: test_changed_files_pull_request (test.easyconfigs.easyconfigs.EasyConfigTest)
Failed to determine merge base (ec: 1, output: ''), falling back to specifying target branch develop
Specific checks only done for the (easyconfig) files that were changed in a pull request.

----------------------------------------------------------------------
List of changed easyconfig files in this PR:
Traceback (most recent call last):
	UCX-1.10.0-GCCcore-10.3.0.eb
  File "test/easyconfigs/easyconfigs.py", line 990, in test_changed_files_pull_request

    self.check_sha256_checksums(changed_ecs)
List of added easyconfig files in this PR:
  File "test/easyconfigs/easyconfigs.py", line 692, in check_sha256_checksums
	UCX-CUDA-1.10.0-GCCcore-10.3.0-CUDA-11.3.0.eb
    self.assertTrue(len(checksum_issues) == 0, "No checksum issues:\n%s" % '\n'.join(checksum_issues))
AssertionError: No checksum issues:
Checksums missing for one or more sources/patches in UCX-CUDA-1.10.0-GCCcore-10.3.0-CUDA-11.3.0.eb: found 1 sources + 1 patches vs 1 checksums

----------------------------------------------------------------------
Ran 12237 tests in 372.346s

FAILED (failures=1)
ERROR: Not all tests were successful.

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[Micket]

Replaced with #13260