planner: refactor the execute path when using plan cache

[Reminiscent]

What problem does this PR solve?

Issue Number: ref #36598

Problem Summary:
Remove the short path for the PointGet when execute execute statement. We will optimize the optimize function for execute statement in the later PR.

What is changed and how it works?

Remove the short path for the PointGet when execute execute statement.

Check List

Tests
Current existing test cases can cover this PR

• 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:

• qw4990
• xhebox

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[sre-bot]

Code Coverage Details: https://codecov.io/github/pingcap/tidb/commit/8a2ef77b462c01b20a0ae6c0ded0f8e1e47be766

[xhebox]

The short path caused a lot of trouble when I am coding stale read.

[qw4990]

There may be a little performance regression after removing this short path, but we'll fix it by cleaning the code path of Plan Cache later.

[Reminiscent]

/merge

[ti-chi-bot]

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

Commit hash: 407657f

[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/integration-common-test	🟥 failed 1, success 10, total 11	47 min	New failing
idc-jenkins-ci/integration-cdc-test	🟢 all 36 tests passed	25 min	Existing passed
idc-jenkins-ci-tidb/common-test	🟢 all 12 tests passed	18 min	Existing passed
idc-jenkins-ci-tidb/integration-ddl-test	🟢 all 6 tests passed	6 min 33 sec	Existing passed
idc-jenkins-ci-tidb/tics-test	🟢 all 1 tests passed	6 min 13 sec	Existing passed
idc-jenkins-ci-tidb/sqllogic-test-2	🟢 all 28 tests passed	5 min 25 sec	Existing passed
idc-jenkins-ci-tidb/sqllogic-test-1	🟢 all 26 tests passed	5 min 4 sec	Existing passed
idc-jenkins-ci-tidb/mybatis-test	🟢 all 1 tests passed	3 min 24 sec	Existing passed
idc-jenkins-ci-tidb/integration-compatibility-test	🟢 all 1 tests passed	2 min 54 sec	Existing passed
idc-jenkins-ci-tidb/plugin-test	🟢 build success, plugin test success	4min	Existing passed