*:add the indexlookup runtime stats infomation (#20145)

[ti-srebot]

cherry-pick #20145 to release-4.0

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Signed-off-by: jyz0309 45495947@qq.com

What problem does this PR solve?

Issue Number: close #19349, close #20323

Problem Summary:Currently, the runtime stats of IndexLookUp is hard to understand
After this pr:

mysql> explain analyze select * from t use index(a) where a > 1;
+-------------------------------+---------+---------+-----------+---------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------+------------------------------------------------+--------------+------+
| id                            | estRows | actRows | task      | access object       | execution info                                                                                                                                                         | operator info                                  | memory       | disk |
+-------------------------------+---------+---------+-----------+---------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------+------------------------------------------------+--------------+------+
| IndexLookUp_7                 | 1.00    | 2       | root      |                     | time:2.102174ms, loops:2, index_task:868.167µs, table_task:{num:1, concurrency:5, time:5.210409ms}                                                                     |                                                | 8.7578125 KB | N/A  |
| ├─IndexRangeScan_5(Build)     | 1.00    | 2       | cop[tikv] | table:t, index:a(a) | time:873.8µs, loops:1, cop_task: {num: 1, max:754.356µs, proc_keys: 2, rpc_num: 1, rpc_time: 698.426µs, copr_cache_hit_ratio: 0.00}, tikv_task:{time:0s, loops:1}      | range:(1,+inf], keep order:false, stats:pseudo | N/A          | N/A  |
| └─TableRowIDScan_6(Probe)     | 1.00    | 2       | cop[tikv] | table:t             | time:619.809µs, loops:2, cop_task: {num: 1, max:540.214µs, proc_keys: 2, rpc_num: 1, rpc_time: 510.336µs, copr_cache_hit_ratio: 0.00}, tikv_task:{time:0s, loops:1}    | keep order:false, stats:pseudo                 | N/A          | N/A  |
+-------------------------------+---------+---------+-----------+---------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------+------------------------------------------------+--------------+------+
3 rows in set (0.00 sec)

What is changed and how it works?

How it Works:

• add the indexlookup runtime stats to get the runstat infomation
• optimze the explain analyze execution info,make the copStat and rootStat output together

Related changes

• Need to cherry-pick to the release branch

Check List

Tests

• Unit test
• Manual test (add detailed scripts or steps below)

Side effects

• Performance regression
  • Consumes more CPU
  • Consumes more MEM

Release note

• add the indexlookup runtime stats infomation

[ti-srebot]

/run-all-tests

[jyz0309]

/run-all-tests

[crazycs520]

LGTM

[crazycs520]

@qw4990 PTAL

[qw4990]

LGTM

[qw4990]

/run-all-tests

[qw4990]

/run-all-tests

[qw4990]

/run-all-tests

[crazycs520]

/merge

[ti-srebot]

Sorry @crazycs520, you don't have permission to trigger auto merge event on this branch.