[1/N][TRTLLM-5195][feat] Share PyTorch tensor between processes

[chang-l]

[TRTLLM-5195][feat] Share PyTorch tensor between processes

Description

This is a first PR split from #5000. It enables sharing of PyTorch tensors (both CPU and CUDA) across processes using shared memory and/or CUDA IPC, avoiding the overhead of serialization and inter-process communication.

Test Coverage

This PR includes tests covering both CPU and CUDA tensors, with various shapes and data types.

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[chang-l]

/bot run --disable-fail-fast

[tensorrt-cicd]

PR_Github #9574 [ run ] triggered by Bot

[tensorrt-cicd]

PR_Github #9574 [ run ] completed with state SUCCESS
/LLM/main/L0_MergeRequest_PR pipeline #7032 completed with status: 'FAILURE'

[chang-l]

/bot run --disable-fail-fast

[tensorrt-cicd]

PR_Github #9579 [ run ] triggered by Bot

[tensorrt-cicd]

PR_Github #9579 [ run ] completed with state SUCCESS
/LLM/main/L0_MergeRequest_PR pipeline #7035 completed with status: 'SUCCESS'
Pipeline passed with automatic retried tests. Check the rerun report for details.

[yechank-nvidia]

Thanks for the wonderful work. LGTM. One general question below.

[chang-l]

/bot run

[tensorrt-cicd]

PR_Github #11346 [ run ] triggered by Bot

[tensorrt-cicd]

PR_Github #11346 [ run ] completed with state SUCCESS
/LLM/main/L0_MergeRequest_PR pipeline #8397 completed with status: 'FAILURE'

[chang-l]

/bot run --disable-fail-fast

[tensorrt-cicd]

PR_Github #11357 [ run ] triggered by Bot

[Superjomn]

LGTM

[tensorrt-cicd]

PR_Github #11357 [ run ] completed with state SUCCESS
/LLM/main/L0_MergeRequest_PR pipeline #8405 completed with status: 'FAILURE'

[pcastonguay]

@chang-l could you check why CI is failing and/or retrigger the tests? Thanks

[chang-l]

/bot run

[tensorrt-cicd]

PR_Github #11460 [ run ] triggered by Bot

[tensorrt-cicd]

PR_Github #11460 [ run ] completed with state SUCCESS
/LLM/main/L0_MergeRequest_PR pipeline #8479 completed with status: 'SUCCESS'
Pipeline passed with automatic retried tests. Check the rerun report for details.