[AUTO-CHERRYPICK] Upgrade `postgresql` to 14.21 for CVE-2026-2003, CVE-2026-2004, CVE-2026-2005, CVE-2026-2006, CVE-2026-2007 [HIGH] - branch main#15854

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Feb 15, 2026

Commits on Feb 15, 2026

Upgrade `postgresql` to 14.21 for CVE-2026-2003, CVE-2026-2004, CVE-2026-2005, CVE-2026-2006, CVE-2026-2007 [HIGH] (#15835)

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