[TRTQA-2802][fix]: add --host for mgmn serve examples script

[xinhe-nv]

PR title

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[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

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[Superjomn]

LGTM

[Superjomn]

/bot skip --comment "only change the example"

[tensorrt-cicd]

PR_Github #4830 [ skip ] triggered by Bot

[tensorrt-cicd]

PR_Github #4830 [ skip ] completed with state SUCCESS
Skipping testing for commit 54819b2