planner: revise isnullRejected check for And and OR

[Yisaer]

Signed-off-by: yisaer [email protected]

What problem does this PR solve?

Issue Number: close #38654

Problem Summary:

What is changed and how it works?

During isNullRejected, the Null from inner table should be remained if another argument is constant.

Check List

Tests

• Unit test

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:

• AilinKid
• winoros

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[AilinKid]

LGTM

[winoros]

We will merge this one unless we come up with another stable and good-understanding algorithm.

[AilinKid]

/merge

[ti-chi-bot]

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

Commit hash: 234b73c

[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/sqllogic-test-1	🟥 failed 1, success 25, total 26	5 min 33 sec	New failing
idc-jenkins-ci-tidb/integration-ddl-test	🔴 failed 1, success 5, total 6	5 min 8 sec	Existing failure
idc-jenkins-ci/integration-cdc-test	🟢 all 38 tests passed	22 min	Existing passed
idc-jenkins-ci-tidb/integration-common-test	🟢 all 17 tests passed	12 min	Existing passed
idc-jenkins-ci-tidb/tics-test	🟢 all 1 tests passed	11 min	Existing passed
idc-jenkins-ci-tidb/common-test	🟢 all 11 tests passed	10 min	Existing passed
idc-jenkins-ci-tidb/sqllogic-test-2	🟢 all 28 tests passed	6 min 43 sec	Existing passed
idc-jenkins-ci-tidb/mybatis-test	🟢 all 1 tests passed	4 min 14 sec	Existing passed
idc-jenkins-ci-tidb/integration-compatibility-test	🟢 all 1 tests passed	3 min 23 sec	Existing passed
idc-jenkins-ci-tidb/plugin-test	🟢 build success, plugin test success	4min	Existing passed