bindinfo: add debugging to plan evolve (#20523)

[ti-srebot]

cherry-pick #20523 to release-4.0

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What problem does this PR solve?

Issue Number: Part of #20417

Problem Summary:

Currently it is very difficult to debug why a new plan is rejected. I believe there is a current bug in the logic, but independently, I've added debugging information and added a threshold of 2x on current execution time just so the error log can contain more stats on the new plan.

What is changed and how it works?

What's Changed:

Rather than timing out a new plan if it won't meet the new query time threshold, an independent threshold is set that is actually longer than the current execution time. This is helpful for debugging purposes.

Related changes

• Need to cherry-pick to the release branch

Check List

Tests

• Manual test (add detailed scripts or steps below)

Manual tested to see error written to the log when plan was rejected.

Side effects

• More time spent on a plan that will ultimately be rejected.

Release note

• When verifying potential new plans, plan binding will now wait before timing out worse plans so that more debug information can be written to the TiDB error log.

[ti-srebot]

/run-all-tests

[lzmhhh123]

LGTM

[eurekaka]

LGTM