### What problem were solved in this pull request?

Issue Number: close https://github.com/oceanbase/miniob/issues/258

日志中的参数直接使用clang-format格式化，参数要么在一行，要么一个一行，或者尽量在一行，会比较丑。主要是因为日志的参数第一个format string，通常比较长，并且其含义特殊，参数需要分多行时，不应该作为“一类”放在同一行上。

### What problem were solved in this pull request?

Issue Number: ref #164 

Problem:

### What is changed and how it works?
使用clang-format格式化benchmark模块代码

### Other information

Fix problem:
1. the buffer pool and b tree is not thread safe;
2. github/workflow/build does not work

### What is changed and how it works?
1. thread-safe buffer pool
- I use a mutex in buffer pool and take a lock in buffer pool operations
such as allocate frame, dispose frame;
- The frame is locked while updating/reading the content of frame;
- Frame manager take a lock when allocate/free pages.

2. thread-safe b+tree
- Crabing protocol is used to support concurrent

3. github/workflow/build
- update the submodules;
- create a build script and run build.sh in build.yaml

Other improvement
1. add code format file
2. add gitignore
3. add memory pool utility
4. remove useless file mpool.h, index_manager.cpp/h
5. rename the interface of disk_buffer_pool basing on the new mem_pool
6. add some logs in db/table/disk_buffer_pool
7. add unit test mem_pool_test/log_test/bplus_tree_test
8. code format all modified files
9. redefine the interface of table_meta
10. change log's  full path as file name
11. add utility function, print_callstack, remove warning of path