2062 Fix duplicate symbols on some Mac builds

[nlslatt]

Fixes #2062

[PhilMiller]

I saw the discussion about this, and agree with the solution.

[codecov]

Codecov Report

Merging #2065 (9dd85f9) into develop (d0b2408) will decrease coverage by 0.01%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           develop    #2065      +/-   ##
===========================================
- Coverage    84.44%   84.43%   -0.02%     
===========================================
  Files          729      730       +1     
  Lines        25846    25842       -4     
===========================================
- Hits         21826    21820       -6     
- Misses        4020     4022       +2     

Impacted Files	Coverage Δ
src/vt/pool/static_sized/memory_pool_equal.impl.h	100.00% <ø> (ø)
src/vt/runnable/runnable.cc	79.01% <ø> (ø)
src/vt/scheduler/suspended_units.cc	0.00% <0.00%> (-14.29%)	⬇️
src/vt/runtime/component/diagnostic.cc	50.00% <0.00%> (-2.95%)	⬇️
src/vt/trace/trace_user.cc	8.82% <0.00%> (-2.61%)	⬇️
src/vt/messaging/async_op.cc	66.66% <0.00%> (-2.57%)	⬇️
src/vt/rdma/collection/rdma_collection.cc	0.00% <0.00%> (-1.39%)	⬇️
src/vt/phase/phase_manager.cc	91.21% <0.00%> (-1.36%)	⬇️
src/vt/registry/auto/auto_registry.cc	71.42% <0.00%> (-0.99%)	⬇️
src/vt/rdma/rdma_handle.cc	72.41% <0.00%> (-0.92%)	⬇️
... and 22 more