Load libcufile.so with RTLD_NODELETE flag

[vuule]

Workaround for a known cuFile issue that can lead to segfault if cuFile library is dynamically unloaded.
Using RTLD_NODELETE when calling dlopen so that the library is not unloaded in dlclose.

Also adds a check for the result of dlopen, to help triage cuFile use issues.

[codecov]

Codecov Report

Merging #9872 (7551cf5) into branch-22.02 (967a333) will decrease coverage by 0.06%.
The diff coverage is 5.48%.

@@               Coverage Diff                @@
##           branch-22.02    #9872      +/-   ##
================================================
- Coverage         10.49%   10.42%   -0.07%     
================================================
  Files               119      119              
  Lines             20305    20469     +164     
================================================
+ Hits               2130     2134       +4     
- Misses            18175    18335     +160     

Impacted Files	Coverage Δ
python/cudf/cudf/__init__.py	0.00% <0.00%> (ø)
python/cudf/cudf/core/_base_index.py	0.00% <0.00%> (ø)
python/cudf/cudf/core/column/column.py	0.00% <0.00%> (ø)
python/cudf/cudf/core/column/string.py	0.00% <ø> (ø)
python/cudf/cudf/core/dataframe.py	0.00% <0.00%> (ø)
python/cudf/cudf/core/frame.py	0.00% <0.00%> (ø)
python/cudf/cudf/core/groupby/groupby.py	0.00% <0.00%> (ø)
python/cudf/cudf/core/index.py	0.00% <ø> (ø)
python/cudf/cudf/core/indexed_frame.py	0.00% <0.00%> (ø)
python/cudf/cudf/core/multiindex.py	0.00% <0.00%> (ø)
... and 14 more

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[karthikeyann]

Looks good. Minor question.

[vuule]

@gpucibot merge