apps: resnet18: Add sample.yaml for CI

Signed-off-by: xychen <xychen@listenai.com>
1 job 于resnet18 in 1 minute 和 28 second (queued for 3 second)
状态 作业 ID 名称 覆盖率
  Ztest
已通过 #58787
zgsz-03 generic
ztest_build_only

00:01:28