add more log for diagnose

[crazycs520]

cherry-pick: #915

Add more logs for diagnose.

Here some log example:

[2023/07/31 14:00:20.505 +08:00] [WARN] [region_request.go:614] ["unable to find stores with given labels"] [region=17] [leader-invalid=false] [labels="[{\"key\":\"zone\",\"value\":\"z99\"}]"]
[2023/07/31 13:57:29.333 +08:00] [INFO] [region_cache.go:2483] ["change store resolve state"] [store=5] [addr=10.0.1.9:20161] [from=needCheck] [to=resolved] [liveness-state=unreachable]
[2023/07/31 13:59:34.977 +08:00] [WARN] [backoff.go:172] ["regionMiss backoffer.maxSleep 40000ms is exceeded, errors:\nepoch_not_match:<>  at 2023-07-31T13:59:33.472306+08:00\nepoch_not_match:<>  at 2023-07-31T13:59:33.973395+08:00\nepoch_not_match:<>  at 2023-07-31T13:59:34.476155+08:00\ntotal-backoff-times: 87, backoff-detail: regionMiss:87\nlongest sleep type: regionMiss, time: 40010ms"]
[2023/07/31 13:56:11.856 +08:00] [INFO] [region_request.go:1252] ["throwing pseudo region error due to no replica available"] [req-ts=443228608411205633] [req-type=Cop] [region="{ region id: 225, ver: 83, confVer: 11 }"] [region-is-valid=false] [retry-times=3] [replica-read-type=leader] [replica-selector-state=tryFollower] [stale-read=false] [replica-status="peer: 226, store: 5, isEpochStale: false, attempts: 1, replica-epoch: 1, store-epoch: 1, store-state: resolved, store-liveness-state: reachable; peer: 227, store: 4, isEpochStale: false, attempts: 1, replica-epoch: 1, store-epoch: 1, store-state: resolved, store-liveness-state: reachable; peer: 228, store: 16, isEpochStale: false, attempts: 1, replica-epoch: 1, store-epoch: 1, store-state: resolved, store-liveness-state: reachable"] [total-backoff-ms=11078] [total-backoff-times=38] [total-region-errors=not_leader:3]

[crazycs520]

@cfzjywxk @zyguan @you06 PTAL

[cfzjywxk]

@crazycs520
The master PR is also needed.

[cfzjywxk]

@crazycs520
It seems that the OnRegionError part logs are missing.