[v3.8.5] Fix light probe could not work. Revert a change in vec3.ts

[dumganhar]

It's a bug starts from v3.8.5 branch: #17703

Code in 3.8.4: https://github.com/cocos/cocos-engine/blob/3.8.4/cocos/core/math/vec3.ts#L949

Re: https://github.com/cocos/3d-tasks/issues/18617#event-15503908587

Changelog

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Continuous Integration

This pull request:

• needs automatic test cases check.

  Manual trigger with @cocos-robot run test cases afterward.

• does not change any runtime related code or build configuration

  If any reviewer thinks the CI checks are needed, please uncheck this option, then close and reopen the issue.

---

Compatibility Check

This pull request:

• changes public API, and have ensured backward compatibility with deprecated features.
• affects platform compatibility, e.g. system version, browser version, platform sdk version, platform toolchain, language version, hardware compatibility etc.
• affects file structure of the build package or build configuration which requires user project upgrade.
• introduces breaking changes, please list all changes, affected features and the scope of violation.

[github-actions]

⚠️ Package size ⤴ 37 bytes, old: 5441124, new: 5441161

Interface Check Report

This pull request does not change any public interfaces !

[dumganhar]

@cocos-robot run test cases

[github-actions]

@dumganhar, Please check the result of run test cases:

• Test Platform: PR-Test
• Editor Version: v3.8.5
• Task Result: PASS
• Task URL: https://cctest.cocos.org/#/reportview/PR-TEST/e4a36a32-7edb-423d-8dc7-c760aa45f2a6/-1
• GitHub Action: https://github.com/cocos/cocos-engine/actions/runs/12139014141

Task Details

[github-actions]

@dumganhar, Please check the result of run test cases:

• Test Platform: PR-Test
• Editor Version: v3.8.5
• Task Result: PASS
• Task URL: https://cctest.cocos.org/#/reportview/PR-TEST/8b8542b0-fdfd-46c5-9dbd-ca1b40250218/-1
• GitHub Action: https://github.com/cocos/cocos-engine/actions/runs/12139014141

Task Details

[bofeng-song]

https://github.com/cocos/3d-tasks/issues/18655
用了最新代码后，该issue也不会黑屏了