DAOS-623 build: Remove ability to build without stdatomic.h
Test stage Build RPM on CentOS 7 completed with status FAILURE. https://build.hpdd.intel.com//job/daos-stack/job/daos/view/change-requests/job/PR-8763/2/execution/node/371/log
Test stage Build DEB on Ubuntu 20.04 completed with status FAILURE. https://build.hpdd.intel.com//job/daos-stack/job/daos/view/change-requests/job/PR-8763/2/execution/node/335/log
Test stage Build RPM on EL 8 completed with status FAILURE. https://build.hpdd.intel.com//job/daos-stack/job/daos/view/change-requests/job/PR-8763/2/execution/node/391/log
Test stage Build RPM on Leap 15 completed with status FAILURE. https://build.hpdd.intel.com//job/daos-stack/job/daos/view/change-requests/job/PR-8763/2/execution/node/362/log
Test stage Build on CentOS 7 completed with status FAILURE. https://build.hpdd.intel.com//job/daos-stack/job/daos/view/change-requests/job/PR-8763/2/execution/node/394/log
Test stage Build RPM on CentOS 7 completed with status FAILURE. https://build.hpdd.intel.com//job/daos-stack/job/daos/view/change-requests/job/PR-8763/7/execution/node/411/log
Test stage Build RPM on Leap 15 completed with status FAILURE. https://build.hpdd.intel.com//job/daos-stack/job/daos/view/change-requests/job/PR-8763/7/execution/node/414/log
Test stage Build on CentOS 7 completed with status FAILURE. https://build.hpdd.intel.com//job/daos-stack/job/daos/view/change-requests/job/PR-8763/7/execution/node/434/log
Test stage Build RPM on CentOS 7 completed with status FAILURE. https://build.hpdd.intel.com//job/daos-stack/job/daos/view/change-requests/job/PR-8763/8/execution/node/377/log
Test stage Build on CentOS 7 completed with status FAILURE. https://build.hpdd.intel.com//job/daos-stack/job/daos/view/change-requests/job/PR-8763/8/execution/node/434/log
Test stage Build on CentOS 7 completed with status FAILURE. https://build.hpdd.intel.com//job/daos-stack/job/daos/view/change-requests/job/PR-8763/9/execution/node/410/log
Test stage Build on CentOS 7 completed with status FAILURE. https://build.hpdd.intel.com//job/daos-stack/job/daos/view/change-requests/job/PR-8763/10/execution/node/391/log
Bug-tracker data: Ticket title is 'Generic ticket for minor code cleanup and improvement' Status is 'Resolved' https://daosio.atlassian.net/browse/DAOS-623
Test stage Build on CentOS 7 completed with status FAILURE. https://build.hpdd.intel.com//job/daos-stack/job/daos/view/change-requests/job/PR-8763/11/execution/node/391/log
Test stage Build on CentOS 7 completed with status FAILURE. https://build.hpdd.intel.com//job/daos-stack/job/daos/view/change-requests/job/PR-8763/12/execution/node/391/log
Let's land.