*: replace exp/slices with std

[hawkingrei]

What problem does this PR solve?

Issue Number: ref #45933

Problem Summary:

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

[codecov]

Codecov Report

Merging #45978 (f95d3c1) into master (d819ea3) will decrease coverage by 1.5247%.
Report is 3 commits behind head on master.
The diff coverage is 90.4761%.

Additional details and impacted files

@@               Coverage Diff                @@
##             master     #45978        +/-   ##
================================================
- Coverage   74.7849%   73.2602%   -1.5247%     
================================================
  Files          1293       1300         +7     
  Lines        397964     400546      +2582     
================================================
- Hits         297617     293441      -4176     
- Misses        80985      88537      +7552     
+ Partials      19362      18568       -794     

Flag	Coverage Δ
integration	26.3929% <23.8095%> (-20.1731%)	⬇️
unit	73.4729% <90.4761%> (+0.1370%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Components	Coverage Δ
dumpling	54.0444% <ø> (ø)
parser	85.0419% <ø> (-0.0076%)	⬇️
br	51.1745% <ø> (-13.5925%)	⬇️

[easonn7]

/LGTM

There are no variable or config changes, LGTM from PM perspective.

[ti-chi-bot]

@easonn7: Please do not delete or edit you lgtm type comment!

In response to this:

/LGTM

There is no variable or config changes, LGTM from PM perspective.

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

[ti-chi-bot]

@easonn7: Please do not delete or edit you lgtm type comment!

In response to this:

/LGTM

There are no variable or config changes, LGTM from PM perspective.

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: easonn7, lance6716

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• OWNERS [lance6716]
• sessionctx/variable/OWNERS [easonn7]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2023-08-11 01:12:48.022098471 +0000 UTC m=+247932.571114458: ☑️ agreed by easonn7.
• 2023-08-11 02:14:27.128782695 +0000 UTC m=+251631.677798682: ☑️ agreed by lance6716.

[hawkingrei]

/retest