Revert "branch-2.1: [bug](auto partition) Fix be crash with single replica insert"

[yiguolei]

Reverts #48536

BE core after this PR， revert it。
*** Check failure stack trace: ***
@ 0x564fa82e5606 google::LogMessage::SendToLog()
@ 0x564fa82e2050 google::LogMessage::Flush()
@ 0x564fa82e5e49 google::LogMessageFatal::~LogMessageFatal()
@ 0x564fa9dcb44a (unknown)
@ 0x564fa8a19e05 google::protobuf::internal::LogMessage::Finish()
@ 0x564f9e68d49e google::protobuf::Map<>::at<>()
@ 0x564f9e68b805 doris::TabletsChannel::_commit_txn()
@ 0x564f9e68b20b doris::TabletsChannel::close()
@ 0x564f9e591fee doris::LoadChannel::_handle_eos()
@ 0x564f9e591ca2 doris::LoadChannel::add_batch()
@ 0x564f9e58c300 doris::LoadChannelMgr::add_batch()
@ 0x564f9e702bb1 std::_Function_handler<>::_M_invoke()
@ 0x564f9e71d3db doris::WorkThreadPool<>::work_thread()
@ 0x564fab0ad760 execute_native_thread_routine
@ 0x7efd907a8ac3 (unknown)
@ 0x7efd9083a850 (unknown)
@ (nil) (unknown)

[hello-stephen]

Thank you for your contribution to Apache Doris.
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Please clearly describe your PR:

1. What problem was fixed (it's best to include specific error reporting information). How it was fixed.
2. Which behaviors were modified. What was the previous behavior, what is it now, why was it modified, and what possible impacts might there be.
3. What features were added. Why was this function added?
4. Which code was refactored and why was this part of the code refactored?
5. Which functions were optimized and what is the difference before and after the optimization?

[yiguolei]

skip buildall