[Enhancement]: Add dynamic configuration for lower_case_table_names instead of hard coding

[SimonChou12138]

Enhancement
lower_case_table_names is a MySQL-compatible system variable used to control the case handling of table names and database names. I found that in the current code, arg.name_case_mode_ = OB_LOWERCASE_AND_INSENSITIVE; is hardcoded as 1

I discovered this issue because after starting the seekdb image with Docker, I noticed that the database names that were originally in uppercase were converted to lowercase by default when importing tables. Upon reviewing the documentation, I found that the MySQL parameters could be dynamically passed in. So, I attempted to add them to the configuration file and mount it to the container. However, it ultimately did not take effect. Upon observing the startup command, I found that the parameters had been added. Therefore, I examined the source code and discovered that it was hardcoded.

[SimonChou12138]

I have fixed this issue in #156