types: print argument as hex literal if non-printable (#65384)

[ti-chi-bot]

This is an automated cherry-pick of #65384

What problem does this PR solve?

Issue Number: close #65383

Problem Summary:

What changed and how does it work?

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
• No need to test

  • I checked and no code files have been changed.

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.

Non printable arguments for prepared statements are now printed in hex in the slow query log

Alternatives

1. Looping over the string and checking for < 0x20 (non printable ASCII and 0x7f (DEL). However that doesn't check any multi-byte non-BMP runes (e.g. \u2060 (SWJ).
2. Using datum.GetStringWithCheck(). Probably heavier and might only check if a string is valid, not if it is printable as well.

[ti-chi-bot]

This cherry pick PR is for a release branch and has not yet been approved by triage owners.
Adding the do-not-merge/cherry-pick-not-approved label.

To merge this cherry pick:

1. It must be LGTMed and approved by the reviewers firstly.
2. For pull requests to TiDB-x branches, it must have no failed tests.
3. AFTER it has lgtm and approved labels, please wait for the cherry-pick merging approval from triage owners.

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[ti-chi-bot]

@dveeden This PR has conflicts, I have hold it.
Please resolve them or ask others to resolve them, then comment /unhold to remove the hold label.

[ti-chi-bot]

@ti-chi-bot: ## If you want to know how to resolve it, please read the guide in TiDB Dev Guide.

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[ti-chi-bot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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Details

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• pkg/sessionctx/variable/OWNERS

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[dveeden]

/unhold

[dveeden]

/retest

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
⚠️ Please upload report for BASE (release-7.5@293331c). Learn more about missing BASE report.

Additional details and impacted files

@@               Coverage Diff                @@
##             release-7.5     #65512   +/-   ##
================================================
  Coverage               ?   72.2038%           
================================================
  Files                  ?       1422           
  Lines                  ?     415302           
  Branches               ?          0           
================================================
  Hits                   ?     299864           
  Misses                 ?      95387           
  Partials               ?      20051           

Flag	Coverage Δ
unit	72.2038% <100.0000%> (?)

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

Components	Coverage Δ
dumpling	52.9400% <0.0000%> (?)
parser	∅ <0.0000%> (?)
br	53.6371% <0.0000%> (?)

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