Add test for defined and reset and Complement tests

[youge325]

新增 reset 和 defined 测试并根据skill添加测试
Paddle中SymInt是int64_t的别名，libtorch中SymInt是一个类，是否需要对齐一下SymInt，还是说以后的测试用例分别编译，只要输出相同就行

[Copilot]

Pull request overview

This pull request adds test coverage for two tensor lifecycle methods: defined() and reset(). These tests verify that tensors can be checked for initialization state and can be properly reset to an undefined state.

• Adds Defined test to verify that a properly initialized tensor returns true for defined()
• Adds Reset test to verify that calling reset() makes a tensor undefined

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[Copilot]

This commented-out code should be removed. The tensor object is already initialized in the test fixture's SetUp() method and is available to all test cases. This commented line appears to be leftover from development and is consistent with similar commented lines in other tests in this file that should also be cleaned up.

[Copilot]

This commented-out code should be removed. The tensor object is already initialized in the test fixture's SetUp() method and is available to all test cases. This commented line appears to be leftover from development and is consistent with similar commented lines in other tests in this file that should also be cleaned up.

[BingooYang]

测试冲突了，解一下冲突，并根据合入的claude skill检查一下测试的全面性

[youge325]

测试冲突了，解一下冲突，并根据合入的claude skill检查一下测试的全面性

好的