Why rootless podman container fails to start when "additionalimagestore" is used in Red Hat Enterprise Linux ?

Issue

• Why does rootless podman container fail to start with "additionalimagestore" option ?
  • Path used in additionalimagestore is not owned by the rootless user and it is read-only

Error: OCI runtime error: runc: runc create failed: unable to start container process: error during container init: error mounting "tmpfs" to rootfs at "/tmp": tmpcopyup: failed to copy /tmp to /proc/self/fd/13 (/tmp/runctop3357647393/runctmpdir1069372518): open /proc/self/fd/13/: operation not supported