valgrind: suppress operator delete[] for tcmalloc

valgrind: suppress operator delete[] for tcmalloc

suppresses a mismatched operator delete[] from the librados client's
destructor:

<error>
  <unique>0xeef7eb</unique>
  <tid>1</tid>
  <kind>MismatchedFree</kind>
  <what>Mismatched free() / delete / delete []</what>
  <stack>
    <frame>
      <ip>0x4C32EA0</ip>
      <obj>/usr/libexec/valgrind/vgpreload_memcheck-amd64-linux.so</obj>
      <fn>operator delete[](void*, unsigned long)</fn>
      <dir>/builddir/build/BUILD/valgrind-3.16.0/coregrind/m_replacemalloc</dir>
      <file>vg_replace_malloc.c</file>
      <line>660</line>
    </frame>
    <frame>
      <ip>0x5FBEB86</ip>
      <obj>/usr/lib64/librados.so.2.0.0</obj>
    </frame>
    <frame>
      <ip>0x5FBEF2C</ip>
      <obj>/usr/lib64/librados.so.2.0.0</obj>
    </frame>
    <frame>
      <ip>0x5F7F7C5</ip>
      <obj>/usr/lib64/librados.so.2.0.0</obj>
      <fn>librados::v14_2_0::Rados::shutdown()</fn>
    </frame>

Fixes: https://tracker.ceph.com/issues/49501
Signed-off-by: Casey Bodley <cbodley@redhat.com>