chore(docker): add the instructions for deploying openGemini to KubeE… (

openGemini#87)

chore(docker): add the instructions for deploying openGemini to KubeEdge and K8s

1. Added instructions for deploying openGemini to KubeEdge and K8s.
2. Sample KubeEdge and K8s Configuration Files
3. Example of the openGemini configuration file

Signed-off-by: xiangyu5632 <xiangyu5632@126.com>

Merge pull request openGemini#9 from shilinlee/shilinlee-fix-ut

test: prevent directory conflicts with built-in t.TempDir()