This is an automated cherry-pick of #9994

What problem does this PR solve?

Issue Number: ref #6092, close #10029

Problem Summary:

What is changed and how it works?

Fix related regression caused by https://github.com/pingcap/tiflash/pull/9661

Before, one query reads pack [start, end) from disk, and add it them to cache, 
meanwhile another query also requests to read pack [start, end), then it need to copy each pack data to a new column.

Now, return the cached column directly.

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

None