JS: Promote js/loop-iteration-skipped-due-to-shifting to the Code Quality suite

[Napalys]

The following pull request makes changes to js/loop-iteration-skipped-due-to-shifting:

• Promotes it to quality suite.
• Fixed false positives when splice is used as a condition that adjusts the loop counter.
• Added a test for a false positive that isn’t worth fixing.

MRVA shows good results (61 out of which most are true positives). Autofix seems to be able to do the job, it even marked the false positive which I have mentioned before as false positive 🤯

[Copilot]

Pull Request Overview

This PR promotes the js/loop-iteration-skipped-due-to-shifting query to the Code Quality suite, refines its false-positive logic, and adds corresponding tests.

• Updated query metadata and suite inclusion for Code Quality promotion
• Excluded splice calls used in conditional guards from false positives
• Extended tests and expected results for both true positives and a retained false positive

Reviewed Changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
javascript/ql/test/query-tests/Statements/LoopIterationSkippedDueToShifting/tst.js	Added test functions covering try/catch, logical-and, and if‐guards
javascript/ql/test/query-tests/Statements/LoopIterationSkippedDueToShifting/LoopIterationSkippedDueToShifting.expected	Added expected alerts for new true-positive cases
javascript/ql/src/change-notes/2025-06-12-loop-iteration.md	Documented addition of reliability tag
javascript/ql/src/change-notes/2025-06-12-loop-iteration-fix.md	Noted fix for false positives when splice is used in conditions
javascript/ql/src/Statements/LoopIterationSkippedDueToShifting.ql	Changed tags to quality, added guard to skip splice-in-condition
javascript/ql/integration-tests/query-suite/javascript-code-quality.qls.expected	Included the query in the JavaScript Code Quality suite

Comments suppressed due to low confidence (2)

javascript/ql/src/Statements/LoopIterationSkippedDueToShifting.ql:9

• The reliability and correctness lines aren’t prefixed with @tags, so they may not be recognized. Consider combining all tags on one annotation, e.g. * @tags quality reliability correctness.

*       reliability

javascript/ql/src/change-notes/2025-06-12-loop-iteration.md:4

• [nitpick] Since the PR also promotes this query to the Code Quality suite, consider adding a bullet note about that promotion to keep change-notes in sync with the integration-test update.

* The `js/loop-iteration-skipped-due-to-shifting` query has been updated with `reliability` tag.