types: move file `const_test.go` from the parser repository (#8211)
types: move file `const_test.go` from the parser repository (#8211)


pingcap/tidb,ngaut/tidb,kyle-wang/tidb,ngaut/tidb,ngaut/tidb,EvilMcJerkface/tidb,Cofyc/tidb,c4pt0r/tidb,kyle-wang/tidb,c4pt0r/tidb,kyle-wang/tidb,qiuyesuifeng/tidb,kyle-wang/tidb,mccxj/tidb,ngaut/tidb,mccxj/tidb,coocood/tidb,c4pt0r/tidb,pingcap/tidb,c4pt0r/tidb,cosmtrek/tidb,qiuyesuifeng/tidb,pingcap/tidb,EvilMcJerkface/tidb,Cofyc/tidb,kyle-wang/tidb,c4pt0r/tidb,pingcap/tidb,ngaut/tidb,ngaut/tidb,kyle-wang/tidb,ming-relax/tidb,pingcap/tidb,tiancaiamao/tidb,pingcap/tidb,tiancaiamao/tidb,ming-relax/tidb,XuHuaiyu/tidb,XuHuaiyu/tidb,c4pt0r/tidb,coocood/tidb,cosmtrek/tidb