Test failure alignedallocatortest on AppleClang

With "The CXX compiler identification is AppleClang 12.0.5.12050022" I get an std::bad_alloc in the alignedallocatortest on master.

Start 113: alignedallocatortest

113: Test command: dune-common/build-cmake/dune/common/test/alignedallocatortest
113: Test timeout computed to be: 300
113: libc++abi: terminating with uncaught exception of type std::bad_alloc: std::bad_alloc
1/1 Test #113: alignedallocatortest .............Subprocess aborted***Exception:   0.02 sec