Some tests in DispatchTaskLoop logs many "get unfinished(pending, running or reverting) tasks failed" #42767
Description
Bug Report
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1. Minimal reproduce step (Required)
current master
https://do.pingcap.net/jenkins/blue/organizations/jenkins/pingcap%2Ftidb%2Fghpr_unit_test/detail/ghpr_unit_test/21186/pipeline
https://do.pingcap.net/jenkins/blue/rest/organizations/jenkins/pipelines/pingcap/pipelines/tidb/pipelines/ghpr_unit_test/runs/21137/nodes/54/steps/59/log/?start=0
2. What did you expect to see? (Required)
3. What did you see instead (Required)
TestSimpleNormalFlow
[2023/04/03 15:27:23.199 +08:00] [WARN] [dispatcher.go:159] ["get unfinished(pending, running or reverting) tasks failed"] [error="[schema:1146]Table 'mysql.tidb_global_task' doesn't exist"] [errorVerbose="[schema:1146]Table 'mysql.tidb_global_task' doesn't exist\ngithub.com/pingcap/errors.AddStack\n\texternal/com_github_pingcap_errors/errors.go:174\ngithub.com/pingcap/errors.(*Error).GenWithStackByArgs\n\texternal/com_github_pingcap_errors/normalize.go:164\ngithub.com/pingcap/tidb/infoschema.(*infoSchema).TableByName\n\tinfoschema/infoschema.go:207\ngithub.com/pingcap/tidb/infoschema.(*SessionExtendedInfoSchema).TableByName\n\tinfoschema/infoschema.go:696\ngithub.com/pingcap/tidb/planner/core.(*preprocessor).tableByName\n\tplanner/core/preprocess.go:476\ngithub.com/pingcap/tidb/planner/core.(*preprocessor).handleTableName\n\tplanner/core/preprocess.go:1555\ngithub.com/pingcap/tidb/planner/core.(*preprocessor).Leave\n\tplanner/core/preprocess.go:577\ngithub.com/pingcap/tidb/parser/ast.(*TableName).Accept\n\tparser/ast/dml.go:449\ngithub.com/pingcap/tidb/parser/ast.(*TableSource).Accept\n\tparser/ast/dml.go:601\ngithub.com/pingcap/tidb/parser/ast.(*Join).Accept\n\tparser/ast/dml.go:241\ngithub.com/pingcap/tidb/parser/ast.(*TableRefsClause).Accept\n\tparser/ast/dml.go:802\ngithub.com/pingcap/tidb/parser/ast.(*SelectStmt).Accept\n\tparser/ast/dml.go:1462\ngithub.com/pingcap/tidb/planner/core.Preprocess\n\tplanner/core/preprocess.go:136\ngithub.com/pingcap/tidb/executor.(*Compiler).Compile\n\texecutor/compiler.go:63\ngithub.com/pingcap/tidb/session.(*session).ExecuteStmt\n\tsession/session.go:2150\ngithub.com/pingcap/tidb/session.(*session).ExecuteInternal\n\tsession/session.go:1638\ngithub.com/pingcap/tidb/disttask/framework/storage.execSQL\n\tdisttask/framework/storage/task_table.go:96\ngithub.com/pingcap/tidb/disttask/framework/storage.(*GlobalTaskManager).GetTasksInStates\n\tdisttask/framework/storage/task_table.go:195\ngithub.com/pingcap/tidb/disttask/framework/dispatcher.(*dispatcher).DispatchTaskLoop\n\tdisttask/framework/dispatcher/dispatcher.go:157\ngithub.com/pingcap/tidb/util.(*WaitGroupWrapper).Run.func1\n\tutil/wait_group_wrapper.go:154\nruntime.goexit\n\tsrc/runtime/asm_amd64.s:1598"]