tidb v7.5.6

For new features, improvements, and bug fixes released in v7.5.6 for TiDB, see TiDB v7.5.6 release notes.

See the difference from the issue perspective:

• pingcap/tidb#56100
• pingcap/tidb#51723
• pingcap/tidb#58870
• pingcap/tidb#54746
• pingcap/tidb#46375
• pingcap/tidb#51877
• pingcap/tidb#56494
• pingcap/tidb#58303
• pingcap/tidb#58875
• pingcap/tidb#58374
• pingcap/tidb#58900
• pingcap/tidb#59347
• pingcap/tidb#57784
• pingcap/tidb#56013
• pingcap/tidb#58484
• pingcap/tidb#59357
• pingcap/tidb#57915
• pingcap/tidb#58738
• pingcap/tidb#59194
• pingcap/tidb#58476
• pingcap/tidb#58590
• pingcap/tidb#53175
• pingcap/tidb#53176
• pingcap/tidb#58633
• pingcap/tidb#59524
• pingcap/tidb#58581
• pingcap/tidb#58378
• pingcap/tidb#56472
• pingcap/tidb#57959
• pingcap/tidb#59211
• pingcap/tidb#55248
• pingcap/tidb#58769
• pingcap/tidb#53966
• pingcap/tidb#59093
• pingcap/tidb#57804
• pingcap/tidb#58845
• pingcap/tidb#58430
• pingcap/tidb#59718
• pingcap/tidb#58031
• pingcap/tidb#59326
• pingcap/tidb#59534
• pingcap/tidb#55087
• pingcap/tidb#52747
• pingcap/tidb#49839
• pingcap/tidb#59086
• pingcap/tidb#59877
• pingcap/tidb#20710