planner: update the cost formula of IndexJoin+IndexLookup

[qw4990]

What problem does this PR solve?

Issue Number: ref #35240

Problem Summary: planner: update the cost formula of IndexJoin+IndexLookup

What is changed and how it works?

IndexJoin + IndexLookup may cause massive double-read requests, so decrease the batch-ratio in this case.

An example, TPCDS-Q76:

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

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• chrysan
• time-and-fate

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[qw4990]

/run-build-arm64 comment=true

[sre-bot]

download tidb binary(linux arm64) at http://fileserver.pingcap.net/download/builds/pingcap/test/tidb/8361589fffcf475a62b9724bc5e8accbf44b992d/centos7/tidb-linux-arm64.tar.gz

[qw4990]

/merge

[ti-chi-bot]

This pull request has been accepted and is ready to merge.

Commit hash: db1bc53

[ti-chi-bot]

In response to a cherrypick label: new pull request created: #39652.

[sre-bot]

TiDB MergeCI notify

🔴 Bad News! New failing [1] after this pr merged.
These new failed integration tests seem to be caused by the current PR, please try to fix these new failed integration tests, thanks!

CI Name	Result	Duration	Compare with Parent commit
idc-jenkins-ci-tidb/common-test	🟥 failed 1, success 10, total 11	10 min	New failing
idc-jenkins-ci/integration-cdc-test	🔴 failed 1, success 39, total 40	18 min	Existing failure
idc-jenkins-ci-tidb/integration-ddl-test	✅ all 6 tests passed	4 min 24 sec	Fixed
idc-jenkins-ci-tidb/integration-common-test	🟢 all 17 tests passed	16 min	Existing passed
idc-jenkins-ci-tidb/tics-test	🟢 all 1 tests passed	5 min 35 sec	Existing passed
idc-jenkins-ci-tidb/sqllogic-test-1	🟢 all 26 tests passed	5 min 4 sec	Existing passed
idc-jenkins-ci-tidb/sqllogic-test-2	🟢 all 28 tests passed	4 min 33 sec	Existing passed
idc-jenkins-ci-tidb/mybatis-test	🟢 all 1 tests passed	4 min 4 sec	Existing passed
idc-jenkins-ci-tidb/integration-compatibility-test	🟢 all 1 tests passed	2 min 43 sec	Existing passed
idc-jenkins-ci-tidb/plugin-test	🟢 build success, plugin test success	4min	Existing passed