[BugFix] Fix async delta writer crash due to null pointer (backport #62626)

[mergify]

Why I'm doing:

3.3.7-13.2 RELEASE (build 7afd807)
query_id:00000000-0000-0000-0000-000000000000, fragment_instance:00000000-0000-0000-0000-000000000000
tracker:process consumption: 77927381408
tracker:jemalloc_metadata consumption: 16657949088
tracker:jemalloc_fragmentation consumption: 4101717720
tracker:query_pool consumption: 2847840856
tracker:query_pool/connector_scan consumption: 0
tracker:load consumption: 0
tracker:metadata consumption: 1722083679
tracker:tablet_metadata consumption: 540785
tracker:rowset_metadata consumption: 0
tracker:segment_metadata consumption: 222142458
tracker:column_metadata consumption: 1499400436
tracker:tablet_schema consumption: 540785
tracker:segment_zonemap consumption: 152128800
tracker:short_key_index consumption: 59993257
tracker:column_zonemap_index consumption: 441565596
tracker:ordinal_index consumption: 410289224
tracker:bitmap_index consumption: 22144
tracker:bloom_filter_index consumption: 0
tracker:compaction consumption: 0
tracker:schema_change consumption: 0
tracker:column_pool consumption: 0
tracker:page_cache consumption: 40173793840
tracker:jit_cache consumption: 0
tracker:update consumption: 177860278
tracker:chunk_allocator consumption: 0
tracker:passthrough consumption: 0
tracker:clone consumption: 0
tracker:consistency consumption: 0
tracker:datacache consumption: 3439183569
tracker:replication consumption: 0
*** Aborted at 1756211321 (unix time) try "date -d @1756211321" if you are using GNU date ***
PC: @          0x625eb4f starrocks::lake::AsyncDeltaWriter::close()
*** SIGSEGV (@0x0) received by PID 982175 (TID 0x7fe3eae64700) from PID 0; stack trace: ***
    @     0x7fe6fec0620b __pthread_once_slow
    @          0x7bcd340 google::(anonymous namespace)::FailureSignalHandler(int, siginfo_t*, void*)
    @     0x7fe6fec0f630 (/usr/lib64/libpthread-2.17.so+0xf62f)
    @          0x625eb4f starrocks::lake::AsyncDeltaWriter::close()
    @          0x37339f9 starrocks::LakeTabletsChannel::abort()
    @          0x36dbfdb starrocks::LoadChannel::abort()
    @          0x36d7430 starrocks::LoadChannelMgr::cancel(brpc::Controller*, starrocks::PTabletWriterCancelRequest const&, starrocks::PTabletWriterCancelResult*, google::protobuf::Closure*)
    @          0x7e5a114 brpc::policy::ProcessRpcRequest(brpc::InputMessageBase*)
    @          0x7d864b7 brpc::ProcessInputMessage(void*)
    @          0x7d87835 brpc::InputMessenger::OnNewMessages(brpc::Socket*)
    @          0x7d75b2e brpc::Socket::ProcessEvent(void*)
    @          0x7d46bb2 bthread::TaskGroup::task_runner(long)
    @          0x7e9c041 bthread_make_fcontext

What I'm doing:

Fix async delta writer crash due to null pointer

What type of PR is this:

• BugFix
• Feature
• Enhancement
• Refactor
• UT
• Doc
• Tool

Does this PR entail a change in behavior?

• Yes, this PR will result in a change in behavior.
• No, this PR will not result in a change in behavior.

If yes, please specify the type of change:

• Interface/UI changes: syntax, type conversion, expression evaluation, display information
• Parameter changes: default values, similar parameters but with different default values
• Policy changes: use new policy to replace old one, functionality automatically enabled
• Feature removed
• Miscellaneous: upgrade & downgrade compatibility, etc.

Checklist:

• I have added test cases for my bug fix or my new feature
• This pr needs user documentation (for new or modified features or behaviors)
  • I have added documentation for my new feature or new function
• This is a backport pr

Bugfix cherry-pick branch check:

• I have checked the version labels which the pr will be auto-backported to the target branch
  • 4.0
  • 3.5
  • 3.4
  • 3.3

---

This is an automatic backport of pull request #62626 done by [Mergify](https://mergify.com).

[mergify]

Cherry-pick of ecc0382 has failed:

On branch mergify/bp/branch-3.3/pr-62626
Your branch is up to date with 'origin/branch-3.3'.

You are currently cherry-picking commit ecc0382e57.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Changes to be committed:
	modified:   be/src/runtime/lake_tablets_channel.cpp
	modified:   be/test/runtime/lake_tablets_channel_test.cpp

Unmerged paths:
  (use "git add/rm <file>..." as appropriate to mark resolution)
	deleted by us:   be/test/exprs/agg/agg_compressed_key_test.cpp

To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally

[mergify]

@mergify[bot]: Backport conflict, please reslove the conflict and resubmit the pr

[mergify]

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