[BUG] dead lock

Describe the bug
A clear and concise description of what the bug is.

A dead lock scenario:
buffer pool bpA allocate_page and there are no free frames

1. bpA lock itself
2. frame manager purge_frames: lock frame manager
3. It want to purge a frame of another buffer pool(bpB) and try to lock another buffer pool

Another thread:

1. bpB lock itself
2. bpB want to lock frame manager

so the dead lock:
thread 1:
bpA locked
frame manager locked
try to lock bpB

thread 2:
bpB locked
try to lock frame manager

Fast Reproduce Steps(Required)
Steps to reproduce the behavior:
create multiple tables. execute a inserting performance test. wait the frame exhaust.

Expected behavior
A clear and concise description of what you expected to happen.
No dead lock.

Actual Behavior
What is the result? picture is allowed

(gdb) thread 2
[Switching to thread 2 (Thread 0x7fd6f860d700 (LWP 295211))]
#0  0x00007fd6ff06351d in __lll_lock_wait () from /lib64/libpthread.so.0
(gdb) bt
#0  0x00007fd6ff06351d in __lll_lock_wait () from /lib64/libpthread.so.0
#1  0x00007fd6ff05ee1b in _L_lock_812 () from /lib64/libpthread.so.0
#2  0x00007fd6ff05ece8 in pthread_mutex_lock () from /lib64/libpthread.so.0
#3  0x00000000004dddf0 in __gthread_mutex_lock (__mutex=0x60e000007518)
    at /usr/opt/include/c++/9.4.0/x86_64-pc-linux-gnu/bits/gthr-default.h:749
#4  0x00000000004ddfc0 in std::mutex::lock (this=0x60e000007518) at /usr/opt/include/c++/9.4.0/bits/std_mutex.h:100
#5  0x000000000078b111 in common::Mutex::lock (this=0x60e000007518)
    at /home/xiongliyao.xly/miniob-group2/miniob/deps/common/lang/mutex.cpp:281
#6  0x00000000004e5681 in std::scoped_lock<common::Mutex>::scoped_lock (this=0x7fd6f85fbde0, __m=...)
    at /usr/opt/include/c++/9.4.0/mutex:609
#7  0x00000000004c572b in DiskBufferPool::flush_page (this=0x60e0000074a0, frame=...)
    at /home/xiongliyao.xly/miniob-group2/miniob/src/observer/storage/buffer/disk_buffer_pool.cpp:504
#8  0x00000000004da398 in BufferPoolManager::flush_page (this=0x615000000300, frame=...)
    at /home/xiongliyao.xly/miniob-group2/miniob/src/observer/storage/buffer/disk_buffer_pool.cpp:769
#9  0x00000000004ca789 in DiskBufferPool::<lambda(Frame*)>::operator()(Frame *) const (__closure=0x7fd6f85ff310, 
    frame=0x7fd6faa8cc70) at /home/xiongliyao.xly/miniob-group2/miniob/src/observer/storage/buffer/disk_buffer_pool.cpp:572
#10 0x00000000004dcfda in std::_Function_handler<RC(Frame*), DiskBufferPool::allocate_frame(PageNum, Frame**)::<lambda(Frame*)> >:---Type <return> to continue, or q <return> to quit---
:_M_invoke(const std::_Any_data &, <unknown type in /home/xiongliyao.xly/miniob-group2/miniob/build_debug/bin/observer, CU 0x26d1e0, DIE 0x2b8163>) (__functor=..., 
    __args#0=<unknown type in /home/xiongliyao.xly/miniob-group2/miniob/build_debug/bin/observer, CU 0x26d1e0, DIE 0x2b8163>)
    at /usr/opt/include/c++/9.4.0/bits/std_function.h:285
#11 0x00000000004e3549 in std::function<RC (Frame*)>::operator()(Frame*) const (this=0x7fd6f85ff310, __args#0=0x7fd6faa8cc70)
    at /usr/opt/include/c++/9.4.0/bits/std_function.h:688
#12 0x00000000004a8195 in BPFrameManager::purge_frames(int, std::function<RC (Frame*)>) (this=0x615000000300, count=1, 
    purger=...) at /home/xiongliyao.xly/miniob-group2/miniob/src/observer/storage/buffer/disk_buffer_pool.cpp:91
#13 0x00000000004cbf14 in DiskBufferPool::allocate_frame (this=0x60e0000100a0, page_num=407, buffer=0x7fd6f85ff940)
    at /home/xiongliyao.xly/miniob-group2/miniob/src/observer/storage/buffer/disk_buffer_pool.cpp:589
#14 0x00000000004bcda4 in DiskBufferPool::allocate_page (this=0x60e0000100a0, frame=0x7fd6f8601bf0)
    at /home/xiongliyao.xly/miniob-group2/miniob/src/observer/storage/buffer/disk_buffer_pool.cpp:378
#15 0x000000000075e852 in LatchMemo::allocate_page (this=0x7fd6f86029a0, fra me=@0x7fd6f8601bf0: 0x0)
    at /home/xiongliyao.xly/miniob-group2/miniob/src/observer/storage/trx/latch_memo.cpp:59
#16 0x000000000074e234 in BplusTreeHandler::split<LeafIndexNodeHandler> (this=0x611000019fc0, latch_memo=..., 
    frame=0x7fd6f9939a58, new_frame=@0x7fd6f8601bf0: 0x0)
    at /home/xiongliyao.xly/miniob-group2/miniob/src/observer/storage/index/bplus_tree.cpp:1281
---Type <return> to continue, or q <return> to quit---
#17 0x000000000072daba in BplusTreeHandler::insert_entry_into_leaf_node (this=0x611000019fc0, latch_memo=..., 
    frame=0x7fd6f9939a58, key=0x61b000000548 "^", rid=0x7fd6f8605660)
    at /home/xiongliyao.xly/miniob-group2/miniob/src/observer/storage/index/bplus_tree.cpp:1156
#18 0x0000000000737860 in BplusTreeHandler::insert_entry (this=0x611000019fc0, user_key=0x6100024d2044 "^", rid=0x7fd6f8605660)
    at /home/xiongliyao.xly/miniob-group2/miniob/src/observer/storage/index/bplus_tree.cpp:1380
#19 0x00000000006b34af in BplusTreeIndex::insert_entry (this=0x611000019f40, record=0x6100024d2040 "\370R\243\316^", 
    rid=0x7fd6f8605660) at /home/xiongliyao.xly/miniob-group2/miniob/src/observer/storage/index/bplus_tree_index.cpp:92
#20 0x000000000059ac24 in Table::insert_entry_of_indexes (this=0x60f000007840, record=0x6100024d2040 "\370R\243\316^", rid=...)
    at /home/xiongliyao.xly/miniob-group2/miniob/src/observer/storage/table/table.cpp:451
#21 0x0000000000585c2a in Table::insert_record (this=0x60f000007840, record=...)
    at /home/xiongliyao.xly/miniob-group2/miniob/src/observer/storage/table/table.cpp:190
#22 0x00000000005c03af in VacuousTrx::insert_record (this=0x60200000ff90, table=0x60f000007840, record=...)
    at /home/xiongliyao.xly/miniob-group2/miniob/src/observer/storage/trx/vacuous_trx.cpp:56
#23 0x000000000062e76e in InsertPhysicalOperator::open (this=0x6060026c6600, trx=0x60200000ff90)
    at /home/xiongliyao.xly/miniob-group2/miniob/src/observer/sql/operator/insert_physical_operator.cpp:35
#24 0x0000000000457c8c in SqlResult::open (this=0x6110040363c0)
    at /home/xiongliyao.xly/miniob-group2/miniob/src/observer/sql/executor/sql_result.cpp:37
---Type <return> to continue, or q <return> to quit---
#25 0x00000000005d3122 in MysqlCommunicator::write_result (this=0x611000003240, event=0x611004036380, 
    need_disconnect=@0x7fd6f860a2b0: true)
    at /home/xiongliyao.xly/miniob-group2/miniob/src/observer/net/mysql_communicator.cpp:765
#26 0x000000000044b6e2 in SessionStage::handle_request (this=0x6120000001c0, event=0x611004036380)
    at /home/xiongliyao.xly/miniob-group2/miniob/src/observer/session/session_stage.cpp:111
#27 0x000000000044943d in SessionStage::handle_event (this=0x6120000001c0, event=0x611004036380)
    at /home/xiongliyao.xly/miniob-group2/miniob/src/observer/session/session_stage.cpp:82
#28 0x000000000083836d in common::Threadpool::execute_stage (run_stage=0x6120000001c0, pool=0x616000000c80)
    at /home/xiongliyao.xly/miniob-group2/miniob/deps/common/seda/thread_pool.cpp:423
#29 0x0000000000837fcd in common::Threadpool::run_thread (pool_ptr=0x616000000c80)
    at /home/xiongliyao.xly/miniob-group2/miniob/deps/common/seda/thread_pool.cpp:368
#30 0x00007fd6ff05ce25 in start_thread () from /lib64/libpthread.so.0
#31 0x00007fd6fe28fbad in clone () from /lib64/libc.so.6

Additional context
Add any other context about the problem here.

Start in src/observer/storage/buffer/disk_buffer_pool.cpp, especially BPFrameManager::purge_frames, DiskBufferPool::allocate_frame, and flush_page, using the reported stack and lock sequence to trace buffer-pool and frame-manager ownership. Reproduce by creating multiple tables and running inserts until frames are exhausted; done means the workload no longer deadlocks.