Expand valgrind suppressions to cover more possible leaks from orte

[msimberg]

Intended to catch reports like:

==3582== 
==3582== 8,240 bytes in 1 blocks are possibly lost in loss record 261 of 264
==3582==    at 0x4845828: malloc (in /usr/libexec/valgrind/vgpreload_memcheck-amd64-linux.so)
==3582==    by 0x48C0947: orte_iof_base_write_output (in /usr/lib/x86_64-linux-gnu/libopen-rte.so.40.30.3)
==3582==    by 0xAF8142A: ???
==3582==    by 0x49EC7B1: ??? (in /usr/lib/x86_64-linux-gnu/libevent_core-2.1.so.7.0.1)
==3582==    by 0x49EE41E: event_base_loop (in /usr/lib/x86_64-linux-gnu/libevent_core-2.1.so.7.0.1)
==3582==    by 0x1092F3: ??? (in /usr/bin/orterun)
==3582==    by 0x4A2B14F: (below main) (libc_start_call_main.h:58)
==3582== 
{
   <insert_a_suppression_name_here>
   Memcheck:Leak
   match-leak-kinds: possible
   fun:malloc
   fun:orte_iof_base_write_output
   obj:*
   obj:/usr/lib/x86_64-linux-gnu/libevent_core-2.1.so.7.0.1
   fun:event_base_loop
   obj:/usr/bin/orterun
   fun:(below main)
}

[codacy-production]

Coverage summary from Codacy

See diff coverage on Codacy

Coverage variation	Diff coverage
✅ +0.09% (target: -1.00%)	✅ ∅ (target: 90.00%)

Coverage variation details

	Coverable lines	Covered lines	Coverage
Common ancestor commit (d766280)	18346	13763	75.02%
Head commit (cdeda13)	18346 (+0)	13780 (+17)	75.11% (+0.09%)

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 (#1252)	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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