[Fix](merge-on-write) Fix MergeIndexDeleteBitmapCalculator::calculate_one() coredump

[bobhan1]

What problem does this PR solve?

Problem Summary:

MergeIndexDeleteBitmapCalculatorContext::get_current_key() may return non-OK status when encounter memory allocation failure, which makes MergeIndexDeleteBitmapCalculatorContext::Comparator::operator() returns incorrect result and break some assumptions during the process of multiway merging, which leads to coredump.

 1# 0x00007F507D0B3520 in /lib/x86_64-linux-gnu/libc.so.6
 2# pthread_kill at ./nptl/pthread_kill.c:89
 3# raise at ../sysdeps/posix/raise.c:27
 4# abort at ./stdlib/abort.c:81
 5# 0x000055E3A805DD7D in /mnt/hdd01/ci/doris-deploy-branch-2.1-local/be/lib/doris_be
 6# 0x000055E3A805047A in /mnt/hdd01/ci/doris-deploy-branch-2.1-local/be/lib/doris_be
 7# google::LogMessage::SendToLog() in /mnt/hdd01/ci/doris-deploy-branch-2.1-local/be/lib/doris_be
 8# google::LogMessage::Flush() in /mnt/hdd01/ci/doris-deploy-branch-2.1-local/be/lib/doris_be
 9# google::LogMessageFatal::~LogMessageFatal() in /mnt/hdd01/ci/doris-deploy-branch-2.1-local/be/lib/doris_be
10# doris::MergeIndexDeleteBitmapCalculatorContext::seek_at_or_after(doris::Slice const&) in /mnt/hdd01/ci/doris-deploy-branch-2.1-local/be/lib/doris_be
11# doris::MergeIndexDeleteBitmapCalculator::calculate_one(doris::RowLocation&) at /home/zcp/repo_center/doris_branch-2.1/doris/be/src/olap/delete_bitmap_calculator.cpp:197
12# doris::MergeIndexDeleteBitmapCalculator::calculate_all(std::shared_ptr) in /mnt/hdd01/ci/doris-deploy-branch-2.1-local/be/lib/doris_be
13# doris::Tablet::calc_delete_bitmap_between_segments(std::shared_ptr, std::vector, std::allocator > > const&, std::shared_ptr) at /home/zcp/repo_center/doris_branch-2.1/doris/be/src/olap/tablet.cpp:4075
14# doris::Tablet::update_delete_bitmap_without_lock(std::shared_ptr const&, std::vector, std::allocator > > const*) at /home/zcp/repo_center/doris_branch-2.1/doris/be/src/olap/tablet.cpp:3468
15# doris::Tablet::revise_tablet_meta(std::vector, std::allocator > > const&, std::vector, std::allocator > > const&, bool) at /home/zcp/repo_center/doris_branch-2.1/doris/be/src/olap/tablet.cpp:415
16# doris::EngineCloneTask::_finish_incremental_clone(doris::Tablet*, std::shared_ptr const&, long) at /home/zcp/repo_center/doris_branch-2.1/doris/be/src/olap/task/engine_clone_task.cpp:795
17# doris::EngineCloneTask::_finish_clone(doris::Tablet*, std::__cxx11::basic_string, std::allocator > const&, long, bool) in /mnt/hdd01/ci/doris-deploy-branch-2.1-local/be/lib/doris_be
18# doris::EngineCloneTask::_do_clone() in /mnt/hdd01/ci/doris-deploy-branch-2.1-local/be/lib/doris_be
19# doris::EngineCloneTask::execute() at /home/zcp/repo_center/doris_branch-2.1/doris/be/src/olap/task/engine_clone_task.cpp:159
20# doris::clone_callback(doris::StorageEngine&, doris::TMasterInfo const&, doris::TAgentTaskRequest const&) in /mnt/hdd01/ci/doris-deploy-branch-2.1-local/be/lib/doris_be
21# std::_Function_handler(doris::TAgentTaskRequest const&) const::{lambda()#1}>::_M_invoke(std::_Any_data const&) at /var/local/ldb-toolchain/bin/../lib/gcc/x86_64-linux-gnu/11/../../../../include/c++/11/bits/std_function.h:291
22# doris::ThreadPool::dispatch_thread() at /home/zcp/repo_center/doris_branch-2.1/doris/be/src/util/threadpool.cpp:551
23# doris::Thread::supervise_thread(void*) at /home/zcp/repo_center/doris_branch-2.1/doris/be/src/util/thread.cpp:499
24# start_thread at ./nptl/pthread_create.c:442
25# 0x00007F507D197850 at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:83

Release note

None

Check List (For Author)

• Test

  • Regression test
  • Unit Test
  • Manual test (add detailed scripts or steps below)
  • No need to test or manual test. Explain why:
    • This is a refactor/code format and no logic has been changed.
    • Previous test can cover this change.
    • No code files have been changed.
    • Other reason

• Behavior changed:

  • No.
  • Yes.

• Does this need documentation?

  • No.
  • Yes.

Check List (For Reviewer who merge this PR)

• Confirm the release note
• Confirm test cases
• Confirm document
• Add branch pick label

[dataroaring]

LGTM

[bobhan1]

run buildall

[github-actions]

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

[github-actions]

PR approved by anyone and no changes requested.

[github-actions]

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

[bobhan1]

run buildall

[github-actions]

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

[bobhan1]

run cloud_p0

[zhannngchen]

LGTM

[github-actions]

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

[dataroaring]

LGTM