Fix the issue with the getClassName error under ES6

[knoxHuang]

Re: #

Changelog

• When the script is compiled into ES6 syntax, if a function is defined within a class member function, using js.getClassName will retrieve the name of the defined function instead of the class name.

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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.

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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]

Interface Check Report

This pull request does not change any public interfaces !

[minggo]

@cocos-robot run test cases

[knoxHuang]

@cocos-robot run test cases

[github-actions]

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

• Test Platform: PR-Test
• Editor Version: v3.8.5
• Task Result: FAIL
• Task URL: https://cctest.cocos.org/#/reportview/PR-TEST/3bd7725a-5098-44fe-8198-58ee127344d4/-1
• GitHub Action: https://github.com/cocos/cocos-engine/actions/runs/11006469236

Task Details

Platform	build	boot	runned	crashScene	FailScene
web-mobile	PASS	PASS	FAIL		SpineMesh,Hexa,puzzle,shield-node
ios	PASS	PASS	FAIL		SpineMesh,Hexa,puzzle,shield-node
mac	PASS	PASS	FAIL		SpineMesh,Hexa,puzzle,shield-node

[github-actions]

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

• Test Platform: PR-Test
• Editor Version: v3.8.5
• Task Result: FAIL
• Task URL: https://cctest.cocos.org/#/reportview/PR-TEST/dea8e048-daab-4ccb-8128-f4e75f0534ba/-1
• GitHub Action: https://github.com/cocos/cocos-engine/actions/runs/11006469236

Task Details

Platform	build	boot	runned	crashScene	FailScene
windows	PASS	PASS	FAIL		SpineMesh,Hexa,puzzle,shield-node
android	PASS	PASS	FAIL		Hexa,puzzle,shield-node
wechatgame	PASS	PASS	FAIL		SpineMesh,Hexa,puzzle,shield-node