[bug](function) fix regexp_extract_all can't handle empty str

[zhangstar333]

Proposed changes

regexp_extract_all need return empty result when input is empty str.

Issue Number: close #xxx

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...

[zhangstar333]

run buildall

[github-actions]

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

[doris-robot]

TeamCity be ut coverage result:
Function Coverage: 37.05% (8303/22410)
Line Coverage: 29.21% (66685/228327)
Region Coverage: 27.84% (34623/124360)
Branch Coverage: 24.43% (17588/71996)
Coverage Report: http://coverage.selectdb-in.cc/coverage/c9980352865d85217fbaccbb368bc6b1079064f7_c9980352865d85217fbaccbb368bc6b1079064f7/report/index.html

[doris-robot]

(From new machine)TeamCity pipeline, clickbench performance test result:
the sum of best hot time: 46.88 seconds
stream load tsv: 555 seconds loaded 74807831229 Bytes, about 128 MB/s
stream load json: 20 seconds loaded 2358488459 Bytes, about 112 MB/s
stream load orc: 65 seconds loaded 1101869774 Bytes, about 16 MB/s
stream load parquet: 32 seconds loaded 861443392 Bytes, about 25 MB/s
insert into select: 29.3 seconds inserted 10000000 Rows, about 341K ops/s
storage size: 17162054837 Bytes

[zhangstar333]

run buildall

[doris-robot]

TeamCity be ut coverage result:
Function Coverage: 37.05% (8303/22410)
Line Coverage: 29.20% (66686/228342)
Region Coverage: 27.83% (34616/124371)
Branch Coverage: 24.43% (17593/72002)
Coverage Report: http://coverage.selectdb-in.cc/coverage/c9980352865d85217fbaccbb368bc6b1079064f7_c9980352865d85217fbaccbb368bc6b1079064f7/report/index.html

[doris-robot]

(From new machine)TeamCity pipeline, clickbench performance test result:
the sum of best hot time: 47.64 seconds
stream load tsv: 555 seconds loaded 74807831229 Bytes, about 128 MB/s
stream load json: 20 seconds loaded 2358488459 Bytes, about 112 MB/s
stream load orc: 65 seconds loaded 1101869774 Bytes, about 16 MB/s
stream load parquet: 32 seconds loaded 861443392 Bytes, about 25 MB/s
insert into select: 29.1 seconds inserted 10000000 Rows, about 343K ops/s
storage size: 17162291947 Bytes

[HappenLee]

LGTM

[github-actions]

PR approved by at least one committer and no changes requested.

[github-actions]

PR approved by anyone and no changes requested.

[yiguolei]

LGTM

[zhangstar333]

run p0