[fix](mark join) mark join column should be nullable (#24910)

[mrhhsg]

Proposed changes

pick #24910 from master into branch-2.0

Further comments

If this is a relatively large or complex change, kick off the discussion at dev@doris.apache.org by explaining why you chose the solution you did and what alternatives you considered, etc...

[mrhhsg]

run buildall

[github-actions]

clang-tidy review says "All clean, LGTM! 👍"

[doris-robot]

TeamCity be ut coverage result:
Function Coverage: 38.23% (7931/20748)
Line Coverage: 30.03% (64108/213483)
Region Coverage: 29.25% (33213/113545)
Branch Coverage: 25.07% (17061/68066)
Coverage Report: http://coverage.selectdb-in.cc/coverage/d9a95beddb474adf461ff8a2c4dde0ef06a5bd70_d9a95beddb474adf461ff8a2c4dde0ef06a5bd70/report/index.html

[doris-robot]

(From new machine)TeamCity pipeline, clickbench performance test result:
the sum of best hot time: 49.91 seconds
stream load tsv: 556 seconds loaded 74807831229 Bytes, about 128 MB/s
stream load json: 20 seconds loaded 2358488459 Bytes, about 112 MB/s
stream load orc: 64 seconds loaded 1101869774 Bytes, about 16 MB/s
stream load parquet: 32 seconds loaded 861443392 Bytes, about 25 MB/s
insert into select: 29.4 seconds inserted 10000000 Rows, about 340K ops/s
storage size: 17163877134 Bytes