* [TD-3478] <fix>: increase thread num of table creation same as insertion.

* [TD-3478] <fix>: increase thread num of table creation same as insertion.

fix potential refer to derefed buffer.

* [TD-3478] <fix>: increase thread num of table creation same as insertion.

change rowsPerTbl to interlaceRows
Co-authored-by: NShuduo Sang <sdsang@taosdata.com>