executor: HashJoinExec checks the buildError even if the probeSide is empty (#30471)#30794

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ti-chi-bot merged 3 commits intopingcap:release-5.0from ti-srebot:release-5.0-80ea2389d8db

Dec 20, 2021

+47-8

Commits on Dec 16, 2021

cherry pick pingcap#30471 to release-5.0

XuHuaiyu
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ti-srebot
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resolve conflicts
XuHuaiyu
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Commits on Dec 20, 2021

Merge branch 'release-5.0' into release-5.0-80ea2389d8db
ti-chi-bot
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