fixing the allocator access example for shared mem

[kab163]

With Shared memory on, the allocator access example crashes because the example does not use a name in the test allocation. This PR checks for a shared memory resource and allocates accordingly...

[kab163]

You can reproduce with
cmake -DUMPIRE_ENABLE_BACKTRACE=On -DUMPIRE_ENABLE_FILESYSTEM=On -DUMPIRE_ENABLE_FILE_RESOURCE=On -DUMPIRE_ENABLE_IPC_SHARED_MEMORY=On -DUMPIRE_ENABLE_LOGGING=On -DUMPIRE_ENABLE_MPI=On -DUMPIRE_DEFAULT_SHARED_MEMORY_RESOURCE="POSIX" -DCMAKE_CXX_COMPILER=clang++ -DCMAKE_C_COMPILER=clang -DENABLE_MPI=On ../
and then run the allocator_access example - without this PR's changes, it will crash

[kab163]

@adrienbernede - do you know a way to update the failed test above? It seems like it is not refreshed because looking at the CI everything has passed. Or do I need to rerun everything?

[rhornung67]

@kab163 I tried rerunning release resources on corona, but that didn't fix it. You have the option to merge without the check being reported as passing in GItHub (bypass rules).

Also, @adrienbernede is on vacation and may be slow to respond.

[kab163]

Combining with #1005 and will close that other one