[xorm] add xorm as package into grafana (#60678)
* add xorm and xorm/core as package * remove mssql and oracle as driver * fix some typo * remove unittest * remove some cache * restore the removed part * remove logfile
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* add xorm and xorm/core as package * remove mssql and oracle as driver * fix some typo * remove unittest * remove some cache * restore the removed part * remove logfile