Remove duplicated sort fields from order by clause

[liubin]

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Comprehensive Summary of your change

Remove duplicated sort fields from order by clause
In MustClone() it will set Sorts field twice, that will generate two duplicated order by fields in the generated SQL.

For example, in the project list API, the SQL will be(formated):

[ORM]2023/09/12 19:26:16  -[Queries/default] - [  OK /    db.Query /     7.1ms] -
 [SELECT T0.`project_id`, T0.`owner_id`, T0.`name`,
 T0.`creation_time`, T0.`update_time`, T0.`deleted`, 
T0.`registry_id` 
FROM `project` T0 
WHERE T0.`deleted` = ? 
ORDER BY T0.`name` ASC, T0.`name` ASC 
LIMIT 50] - `false`

Issue being fixed

Fixes #(issue)

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• Well Written Title and Summary of the PR
• Label the PR as needed. "release-note/ignore-for-release, release-note/new-feature, release-note/update, release-note/enhancement, release-note/community, release-note/breaking-change, release-note/docs, release-note/infra, release-note/deprecation"
• Accepted the DCO. Commits without the DCO will delay acceptance.
• Made sure tests are passing and test coverage is added if needed.
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[codecov]

Codecov Report

Merging #19347 (2586707) into main (ed370a4) will increase coverage by 0.02%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main   #19347      +/-   ##
==========================================
+ Coverage   67.45%   67.47%   +0.02%     
==========================================
  Files         988      988              
  Lines      108689   108688       -1     
  Branches     2752     2752              
==========================================
+ Hits        73312    73335      +23     
+ Misses      31435    31410      -25     
- Partials     3942     3943       +1     

Flag	Coverage Δ
unittests	67.47% <ø> (+0.02%)	⬆️

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

Files Changed	Coverage Δ
src/lib/q/query.go	72.91% <ø> (+11.69%)	⬆️

... and 8 files with indirect coverage changes

[chlins]

@liubin Thanks, it makes senses.

[chlins]

lgtm