planner, expression: fix TableFullScan caused by extraHandleId not correctly found (#45139)

[ti-chi-bot]

This is an automated cherry-pick of #45139

What problem does this PR solve?

Issue Number: close #45036

Problem Summary:
Fix the wrong logic to get extraHandleId. And this part needs further refactoring.

What is changed and how it works?

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]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: chrysan, fixdb

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2023-07-12 02:41:52.068530419 +0000 UTC m=+472603.838869126: ☑️ agreed by fixdb.
• 2023-07-12 02:47:01.311365839 +0000 UTC m=+472913.081704584: ☑️ agreed by chrysan.

[chrysan]

/test check-dev /test check-dev2 /test build /test unit-test /test mysql-test

[tiprow]

@chrysan: No presubmit jobs available for pingcap/tidb@release-7.1

In response to this:

/test check-dev /test check-dev2 /test build /test unit-test /test mysql-test

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