tidb-server v7.1.4

For new features, improvements, and bug fixes released in 7.1.4 for tidb-server, see TiDB 7.1.4 release notes.
See the difference from the issue perspective:

- pingcap/tidb#49033

• #49291

• #49377

• #49874

• #49902

• #50067

• #50347

• #50519

• #50068

• #49986

• #50972

• #49299

• #50957

• #51051

• #49566, close #50850, close #50855

• #47594

• #48713

• #48713

• #50337

• #50841

• #48180

• #51204

• #50152

• #48969

• #49423

• #50105

• #50854

• #49679, close #49682

• #50077

• #49823

• #49619

• #38756

• #46522

• #50851

• #50445

• #50082

• #49166

• #50125

• #49414

• #34325

• #50839

• #49308

• #49605

• #51046

• #50566

• #49942

• #50613

• #50767

• #42588

• #50819

• #49344

• #49616

• #49801

• #49466

• #49440

• #32044

• #50926

• #50012

• #49920

• #49151

• #43409

• #50757

• #48301

• #50043, close #51324

• #50533

• #49773

• #49498

• #50741

• #51372

• #51473

• #51427