ddl: support tracing adding index

[tangenta]

What problem does this PR solve?

Issue Number: close #xxx

Problem Summary:

What is changed and how it works?

This PR adds a summary to the log:

tidb> set global tidb_ddl_enable_fast_reorg = 0;
tidb> alter table sbtest1 add index idx_k(k);

Query OK, 0 rows affected (36.37 sec)

[2022/09/22 19:49:17.184 +08:00] [INFO] [index.go:685] ["[ddl] finish add index job"] [job="ID:181, Type:add index, State:done, SchemaState:public, SchemaID:70, TableID:72, RowCount:1000000, ArgLen:3,start time: 2022-09-22 19:48:40.919 +0800 CST, Err:<nil>, ErrCount:0, SnapshotVersion:436167592199585797"] ["time details"="{add-index-worker:36.235535542s, create-records:{sum: 3.323698943s, min: 7.75µs, max: 17.046083ms, avg: 849.833µs}, delete-only:3.561625ms, fetch-create-txn:{sum: 1m30.234648553s, min: 1.737958ms, max: 159.44675ms, avg: 23.072014ms}, fetch-rows:{sum: 11.203536406s, min: 291.125µs, max: 26.522083ms, avg: 2.864621ms}, none:3.084458ms, write-only:31.627917ms, write-reorg:32.622674707s}"]

{
    add-index-worker:36.235535542s, 
    create-records:{sum: 3.323698943s, min: 7.75µs, max: 17.046083ms, avg: 849.833µs}, 
    delete-only:3.561625ms, 
    fetch-create-txn:{sum: 1m30.234648553s, min: 1.737958ms, max: 159.44675ms, avg: 23.072014ms}, 
    fetch-rows:{sum: 11.203536406s, min: 291.125µs, max: 26.522083ms, avg: 2.864621ms}, 
    none:3.084458ms, 
    write-only:31.627917ms, 
    write-reorg:32.622674707s
}

tidb> set global tidb_ddl_enable_fast_reorg = 1;
tidb> alter table sbtest1 add index idx_k(k);

Query OK, 0 rows affected (10.46 sec)

[2022/09/22 19:56:36.285 +08:00] [INFO] [index.go:685] ["[ddl] finish add index job"] [job="ID:183, Type:add index, State:done, SchemaState:public, SchemaID:70, TableID:72, RowCount:1000000, ArgLen:3,start time: 2022-09-22 19:56:25.965 +0800 CST, Err:<nil>, ErrCount:0, SnapshotVersion:436167716035624965"] ["time details"="{add-index-worker:10.272489459s, create-records:{sum: 196.59863ms, min: 708ns, max: 1.009042ms, avg: 50.268µs}, delete-only:3.813333ms, fetch-create-txn:{sum: 5.122028924s, min: 197µs, max: 8.051709ms, avg: 1.309646ms}, fetch-rows:{sum: 4.614772601s, min: 136.416µs, max: 7.926625ms, avg: 1.179946ms}, none:8.527708ms, write-only:40.635459ms, write-reorg:7.186017333s, write-reorg-backfill:7.179895208s, write-reorg-merging:2.514079333s, write-reorg-ready-to-merge:4.8215ms}"]

{
    add-index-worker:10.272489459s, 
    create-records:{sum: 196.59863ms, min: 708ns, max: 1.009042ms, avg: 50.268µs}, 
    delete-only:3.813333ms, 
    fetch-create-txn:{sum: 5.122028924s, min: 197µs, max: 8.051709ms, avg: 1.309646ms}, 
    fetch-rows:{sum: 4.614772601s, min: 136.416µs, max: 7.926625ms, avg: 1.179946ms}, 
    none:8.527708ms, 
    write-only:40.635459ms, 
    write-reorg:7.186017333s, 
    write-reorg-backfill:7.179895208s, 
    write-reorg-merging:2.514079333s, 
    write-reorg-ready-to-merge:4.8215ms
}

Check List

Tests

• [ ] Unit test
• [ ] Integration test
• [ ] Manual test (add detailed scripts or steps below)
• [ ] No code

Side effects

• [ ] Performance regression: Consumes more CPU
• [ ] Performance regression: Consumes more Memory
• [ ] Breaking backward compatibility

Documentation

• [ ] Affects user behaviors
• [ ] Contains syntax changes
• [ ] Contains variable changes
• [ ] Contains experimental features
• [ ] Changes MySQL compatibility

Release note

Please refer to Release Notes Language Style Guide to write a quality release note.

None

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[ti-chi-bot]

@tangenta: PR needs rebase.

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[tangenta]

All the changes has been merged to master, so I will close this PR.