fix[nvbug/5286515]: trtllm-llmapi-launch on single node single gpu

[Superjomn]

PR title

Please write the PR title by following template:

[JIRA ticket link/nvbug link/github issue link][fix/feat/doc/infra/...] <summary of this PR>

For example, assume I have a PR hope to support a new feature about cache manager of Jira TRTLLM-1000 ticket, it would be like

[TRTLLM-1000][feat] Support a new feature about cache manager

Description

Please explain the issue and the solution in short.

Test Coverage

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[Superjomn]

/bot run --only-multi-gpu-test

[tensorrt-cicd]

PR_Github #5664 [ run ] triggered by Bot

[tensorrt-cicd]

PR_Github #5664 [ run ] completed with state FAILURE
/LLM/main/L0_MergeRequest_PR pipeline #4137 (Partly Tested) completed with status: 'FAILURE'

[Superjomn]

/bot run --only-multi-gpu-test

[tensorrt-cicd]

PR_Github #5797 [ run ] triggered by Bot

[tensorrt-cicd]

PR_Github #5797 [ run ] completed with state SUCCESS
/LLM/main/L0_MergeRequest_PR pipeline #4244 (Partly Tested) completed with status: 'FAILURE'

[Superjomn]

/bot run --only-multi-gpu-test --disable-fail-fast

[tensorrt-cicd]

PR_Github #5833 [ run ] triggered by Bot

[tensorrt-cicd]

PR_Github #5833 [ run ] completed with state SUCCESS
/LLM/main/L0_MergeRequest_PR pipeline #4272 (Partly Tested) completed with status: 'SUCCESS'

[Superjomn]

/bot skip --comment "only affect multi-gpu and the tests passed"

[tensorrt-cicd]

PR_Github #5873 [ skip ] triggered by Bot

[tensorrt-cicd]

PR_Github #5873 [ skip ] completed with state SUCCESS
Skipping testing for commit 3248652