Fix LTC build warnings (#83955)
Addresses `Wc++98-compat-extra-semi` warning from https://github.com/llvm/torch-mlir/issues/1264 by removing extraneous semicolon after autogen LTC native function definitions.
```
/home/runner/work/torch-mlir/torch-mlir/build/tools/torch-mlir/python/torch_mlir/csrc/base_lazy_backend/generated/LazyNativeFunctions.cpp:4241:6: warning: extra ';' outside of a function is incompatible with C++98 [-Wc++98-compat-extra-semi]
};
^
```
cc: @wconstab @desertfire @ke1337 @antoniojkim
Pull Request resolved: https://github.com/pytorch/pytorch/pull/83955
Approved by: https://github.com/wconstab
