[Automated]: Update Python API docs #3
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chenfucn
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Jul 17, 2023
Fix memory leak issue which comes from TRT EP's allocator object not
being released upon destruction.
Following is the log from valgrind:
```
==1911860== 100,272 (56 direct, 100,216 indirect) bytes in 1 blocks are definitely lost in loss record 1,751 of 1,832
==1911860== at 0x483CFA3: operator new(unsigned long) (vg_replace_malloc.c:472)
==1911860== by 0x315DC2: std::_MakeUniq<onnxruntime::OrtAllocatorImplWrappingIAllocator>::__single_object std::make_unique<onnxruntime::OrtAllocatorImplWrappingIAllocator, std::shared_ptr<onnxruntime::IAllocator> >(std::shared_ptr<onnxruntime::IAllocator>&&) (unique_ptr.h:857)
==1911860== by 0x30EE7B: OrtApis::KernelContext_GetAllocator(OrtKernelContext const*, OrtMemoryInfo const*, OrtAllocator**) (custom_ops.cc:121)
==1911860== by 0x660D115: onnxruntime::TensorrtExecutionProvider::Compile(std::vector<onnxruntime::IExecutionProvider::FusedNodeAndGraph, std::allocator<onnxruntime::IExecutionProvider::FusedNodeAndGraph> > const&, std::vector<onnxruntime::NodeComputeInfo, std::allocator<onnxruntime::NodeComputeInfo> >&)::{lambda(void*, OrtApi const*, OrtKernelContext*)#3}::operator()(void*, OrtApi const*, OrtKernelContext*) const (tensorrt_execution_provider.cc:2223)
```
This issue happens after this [EP allocator
refactor](microsoft#15833)
chenfucn
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Aug 29, 2023
### Description
Release OrtEnv before main function returns. Before this change, OrtEnv
is deleted when C/C++ runtime destructs all global variables in ONNX
Runtime's core framework.
The callstack is like this:
```
* frame #0: 0x00007fffee39f5a6 libonnxruntime.so.1.16.0`onnxruntime::Environment::~Environment(this=0x00007fffee39fbf2) at environment.h:20:7
frame #1: 0x00007fffee39f614 libonnxruntime.so.1.16.0`std::default_delete<onnxruntime::Environment>::operator()(this=0x00007ffff4c30e50, __ptr=0x0000000005404b00) const at unique_ptr.h:85:2
frame #2: 0x00007fffee39edca libonnxruntime.so.1.16.0`std::unique_ptr<onnxruntime::Environment, std::default_delete<onnxruntime::Environment>>::~unique_ptr(this=0x5404b00) at unique_ptr.h:361:17
frame #3: 0x00007fffee39e2ab libonnxruntime.so.1.16.0`OrtEnv::~OrtEnv(this=0x00007ffff4c30e50) at ort_env.cc:43:1
frame #4: 0x00007fffee39fa96 libonnxruntime.so.1.16.0`std::default_delete<OrtEnv>::operator()(this=0x00007fffefff8f78, __ptr=0x00007ffff4c30e50) const at unique_ptr.h:85:2
frame microsoft#5: 0x00007fffee39f394 libonnxruntime.so.1.16.0`std::unique_ptr<OrtEnv, std::default_delete<OrtEnv>>::~unique_ptr(this=0x7ffff4c30e50) at unique_ptr.h:361:17
frame microsoft#6: 0x00007ffff78574b5 libc.so.6`__run_exit_handlers + 261
frame microsoft#7: 0x00007ffff7857630 libc.so.6`exit + 32
frame microsoft#8: 0x00007ffff783feb7 libc.so.6`__libc_start_call_main + 135
frame microsoft#9: 0x00007ffff783ff60 libc.so.6`__libc_start_main@@GLIBC_2.34 + 128
frame microsoft#10: 0x0000000000abbdee node`_start + 46
```
After this change, OrtEnv will be deleted before the main function
returns and nodejs is still alive.
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