Cleanup metastore to put unnecessary parameters in EnvironmentContext

for example, void alter_table(1:string dbname, 2:string tbl_name, 3:Table new_tbl) and void alter_table_with_environment_context(1:string dbname, 2:string tbl_name, 3:Table new_tbl, 4:EnvironmentContext environment_context), we plan to keep only the latter one.