Revert "[RVec] Make the SMO version optimise on osx for T non copiable"
Revert "[RVec] Make the SMO version optimise on osx for T non copiable"

This reverts commit 53171baf3a51b8ca710f2ec70c3fe6f26bfc5f5c.

Reverting RVec's SBO implementation until we have a proper fix
for the crashes seen in ROOT-10079.

root-mirror/root,karies/root,olifre/root,root-mirror/root,karies/root,karies/root,root-mirror/root,root-mirror/root,olifre/root,olifre/root,karies/root,karies/root,olifre/root,olifre/root,root-mirror/root,root-mirror/root,karies/root,karies/root,root-mirror/root,olifre/root,root-mirror/root,karies/root,olifre/root,olifre/root,olifre/root,root-mirror/root,root-mirror/root,olifre/root,karies/root,olifre/root,karies/root,root-mirror/root,karies/root