Add security configuration documentation and migrate security docs di… (#18996)#19092

Merged

ti-chi-bot[bot] merged 2 commits intopingcap:release-5.4from ti-chi-bot:cherry-pick-18996-to-release-5.4

Oct 12, 2024

+126-7

Commits on Oct 12, 2024

This is an automated cherry-pick of pingcap#18996

TopScrew
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qiancai
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