Fix 0.11 issues

[auxten]

Fix many issues introduced by rebasing ClickHouse 23.6

• Add query_stateful low level func
• Add UUID generate_from_pid()
• Add SharedPtrContextHolder(todo: fix leak shared)
• Use pid as Session id
• Add ignore
• Use createSharedHolder to create shared_context in Client
• Free query_result_memory vector only in free_result
• Set background_schedule_pool_size 8
• Use all cpu including logical ones
• No exception if table uuid exist for stateful query
• Init query_result_memory to nullptr on construct
• Use all the cores
• Set max_thread_pool_free_size = 0 and use a leaky shared_context for now
• Add chdb-todo: fix SharedPtrContextHolder.shared leak
• Test for gc result on empty output
• Add test_final_join
• Disable BackgroundCleanup
• Set background_schedule_pool_size 0