Suppress hwloc_topology_load leak reported by valgrind

[msimberg]

Suppresses warnings like:

==3585== 
==3585== HEAP SUMMARY:
==3585==     in use at exit: 150,459 bytes in 456 blocks
==3585==   total heap usage: 25,548 allocs, 25,092 frees, 5,775,479 bytes allocated
==3585== 
==3585== 24 bytes in 1 blocks are possibly lost in loss record 94 of 266
==3585==    at 0x4845828: malloc (in /usr/libexec/valgrind/vgpreload_memcheck-amd64-linux.so)
==3585==    by 0x4C46D29: hwloc_bitmap_dup (in /usr/lib/x86_64-linux-gnu/libhwloc.so.15.6.3)
==3585==    by 0x4C3DAE7: ??? (in /usr/lib/x86_64-linux-gnu/libhwloc.so.15.6.3)
==3585==    by 0x4C3DA75: ??? (in /usr/lib/x86_64-linux-gnu/libhwloc.so.15.6.3)
==3585==    by 0x4C3DA75: ??? (in /usr/lib/x86_64-linux-gnu/libhwloc.so.15.6.3)
==3585==    by 0x4C3DA75: ??? (in /usr/lib/x86_64-linux-gnu/libhwloc.so.15.6.3)
==3585==    by 0x4C3DA75: ??? (in /usr/lib/x86_64-linux-gnu/libhwloc.so.15.6.3)
==3585==    by 0x4C3DA75: ??? (in /usr/lib/x86_64-linux-gnu/libhwloc.so.15.6.3)
==3585==    by 0x4C41F52: hwloc_topology_load (in /usr/lib/x86_64-linux-gnu/libhwloc.so.15.6.3)
==3585==    by 0x7932C58: ???
==3585==    by 0x795788B: ???
==3585==    by 0x78E2802: ???
==3585== 
{
   <insert_a_suppression_name_here>
   Memcheck:Leak
   match-leak-kinds: possible
   fun:malloc
   fun:hwloc_bitmap_dup
   obj:/usr/lib/x86_64-linux-gnu/libhwloc.so.15.6.3
   obj:/usr/lib/x86_64-linux-gnu/libhwloc.so.15.6.3
   obj:/usr/lib/x86_64-linux-gnu/libhwloc.so.15.6.3
   obj:/usr/lib/x86_64-linux-gnu/libhwloc.so.15.6.3
   obj:/usr/lib/x86_64-linux-gnu/libhwloc.so.15.6.3
   obj:/usr/lib/x86_64-linux-gnu/libhwloc.so.15.6.3
   fun:hwloc_topology_load
   obj:*
   obj:*
   obj:*
}

I've only seen this triggered on the MPI tests, so I'm assuming this is coming from inside OpenMPI and not our hwloc usage.

[codacy-production]

Coverage summary from Codacy

See diff coverage on Codacy

Coverage variation	Diff coverage
✅ +0.07% (target: -1.00%)	✅ ∅ (target: 90.00%)

Coverage variation details

	Coverable lines	Covered lines	Coverage
Common ancestor commit (55bcd72)	18260	13784	75.49%
Head commit (4412f09)	18260 (+0)	13797 (+13)	75.56% (+0.07%)

Coverage variation is the difference between the coverage for the head and common ancestor commits of the pull request branch: <coverage of head commit> - <coverage of common ancestor commit>

Diff coverage details

	Coverable lines	Covered lines	Diff coverage
Pull request (#1282)	0	0	∅ (not applicable)

Diff coverage is the percentage of lines that are covered by tests out of the coverable lines that the pull request added or modified: <covered lines added or modified>/<coverable lines added or modified> * 100%

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