[Pick](Variant) fix heap use after free and optimize cases

[eldenmoon]

#37991
#37976

[doris-robot]

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[eldenmoon]

run buildall

[doris-robot]

TeamCity be ut coverage result:
Function Coverage: 36.46% (9240/25345)
Line Coverage: 27.99% (75524/269792)
Region Coverage: 26.81% (38829/144806)
Branch Coverage: 23.56% (19717/83694)
Coverage Report: http://coverage.selectdb-in.cc/coverage/3ceaec6e37beaa021c06863ec9100d654601a3c2_3ceaec6e37beaa021c06863ec9100d654601a3c2/report/index.html

[eldenmoon]

run buildall

[doris-robot]

TeamCity be ut coverage result:
Function Coverage: 36.45% (9238/25345)
Line Coverage: 27.98% (75497/269797)
Region Coverage: 26.80% (38815/144812)
Branch Coverage: 23.55% (19709/83696)
Coverage Report: http://coverage.selectdb-in.cc/coverage/fc75e366d262c2b7082a1d995dcdecccb75433ff_fc75e366d262c2b7082a1d995dcdecccb75433ff/report/index.html