fix: temporary dirs are created by default

[rb-union]

Modify not to automatically create temporary directories.

• AIModelServiceData should not be created, but not fully tested.

Log: Not create temporary dirs by default

[deepin-ci-robot]

deepin pr auto review

关键摘要:

• 在AIModelServiceData::AIModelServiceData构造函数中，enhanceTemp的初始化应该在supportNameToModel.isEmpty()条件之外，以避免在没有模型数据时创建临时目录。
• convertTemp的初始化也应该在isValid()条件之外，以确保在AIModelService实例无效时不会尝试创建临时目录。
• enhanceTemp和convertTemp的类型从QTemporaryDir更改为QScopedPointer<QTemporaryDir>，这是一个好的做法，因为它确保了临时目录在不再需要时会被正确地清理。
• isTemporaryFile方法的修改确保只有在AIModelService实例有效时才会检查文件是否是临时文件。
• checkConvertFile方法的修改也做了类似的事情，只有在AIModelService实例有效时才会检查文件路径是否是临时文件。

是否建议立即修改:
是

[deepin-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: rb-union, starhcq

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[pengfeixx]

[是否满足兼容性要求] Y
[是否满足commit提交规范] Y
[是否满足编码规范] Y
[Review结论] Pass
[Fail原因] N/A