Fix temp object out of scope issue (#8767)

[ti-chi-bot]

This is an automated cherry-pick of #8767

What problem does this PR solve?

Issue Number: close #8674

Problem Summary:
When encode enum column, we get the enum name from DataTypeEnum's getNameForValue. However, the return value is a temporary object, and its life scope is limited by the construction of TiDBEnum:
https://github.com/pingcap/tiflash/blob/b9468ccfaa0da1e004b36acfb081b3da4ff2d07e/dbms/src/Flash/Coprocessor/ArrowColCodec.cpp#L350C1-L352C99,
And the name field in TiDBEnum is a constant reference also, which points to the temporary object.
Confirmed this root cause by two steps:

1. When the crash happen, the getNameForValue still can return the correct name, that means the DataTypeEnum instance memory is not released
2. The illegal StringRef's char pointer is different from the one inside getNameForValue.

Still not sure why v7.5.0 is not affected by this issue, debug version seems not affected by the issue either.

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

None

[yibin87]

LGTM

[yibin87]

/run-all-tests

[yibin87]

/run-all-tests

[yibin87]

/rebuild

[yibin87]

/test ?

[ti-chi-bot]

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[JaySon-Huang]

/run-all-tests

[yibin87]

/run-integration-test

[yibin87]

/run-integration-test

[yibin87]

/run-integration-test

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: xzhangxian1008, yibin87

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-03-06 03:15:39.889227758 +0000 UTC m=+223366.911474147: ☑️ agreed by yibin87.
• 2024-03-26 02:03:09.924749939 +0000 UTC m=+1947016.946996338: ☑️ agreed by xzhangxian1008.

[yibin87]

/run-all-tests

[Lloyd-Pottiger]

/build

[Lloyd-Pottiger]

/run-integration-test

[JaySon-Huang]

There should be something wrong with the test script about handling special chararters in the .test file

Which is fixed in the following branches but not fixed in the release-6.1 branch.

[yibin87]

/run-all-tests