[branch-2.0-fix](partial update) only report error when in strict mode partial update when finding missing rowsets during flushing memtable

[bobhan1]

Proposed changes

fix#28679
pick from master: #28764

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...

[github-actions]

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

[bobhan1]

run buildall

[bobhan1]

run buildall

[github-actions]

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

[dataroaring]

LGTM

[github-actions]

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

[github-actions]

PR approved by anyone and no changes requested.

[doris-robot]

TeamCity be ut coverage result:
Function Coverage: 37.79% (7991/21144)
Line Coverage: 29.50% (64918/220077)
Region Coverage: 28.97% (33404/115295)
Branch Coverage: 24.84% (17139/68986)
Coverage Report: http://coverage.selectdb-in.cc/coverage/4041c9b963bfecf7ef66fb60af0d98718c0cea46_4041c9b963bfecf7ef66fb60af0d98718c0cea46/report/index.html

[zhannngchen]

LGTM

[bobhan1]

run clickbench

[doris-robot]

(From new machine)TeamCity pipeline, clickbench performance test result:
the sum of best hot time: 47.91 seconds
stream load tsv: 568 seconds loaded 74807831229 Bytes, about 125 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: 29.9 seconds inserted 10000000 Rows, about 334K ops/s
storage size: 17164041860 Bytes