zh: Add docs about how to destroy a tidb cluster and how to view logs #7410

Job	Run time
check-file-encoding	7s
check-manual-line-breaks	9s
check-control-characters	11s
check-git-conflicts	6s
check-unclosed-tags	6s
markdownlint	22s
verify-internal-link-anchors	12s
verify-internal-links	10s
	1m 23s

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