v1.16.4

Fixes

• Fix that tiup did not remove download tempdir (#2626, @xhebox)
• Fix that tiup may not close gracefully sometimes (#2607, @xhebox)
• Fix possible panic duration tiup-cluster upgrade (#2598, @xhebox)
• Fix that tiup dont repect the HOME env variable in some cases (#2624, @dveeden)
• Fix typos in tiup (#2601, @ottok)