<fix>[compute]: fix magic string enableDpdkVhostuser in VmNicManagerImpl

[ZStack-Robot]

Move enableDpdkVhostuser tag constant from premium ZNS to
VmSystemTags in the zstack project to eliminate magic string
in VmNicManagerImpl.getVmNicType().

Resolves: ZCF-1936

Change-Id: I21bec7237d909922c08f369ac5b269b4de14c8d3

sync from gitlab !9711

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

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Run ID: d60f8e97-1a46-4baa-b3a3-a9826d53b551

📥 Commits

Reviewing files that changed from the base of the PR and between 21ebc82 and 55c21ab.

📒 Files selected for processing (2)

• compute/src/main/java/org/zstack/compute/vm/VmNicManagerImpl.java
• compute/src/main/java/org/zstack/compute/vm/VmSystemTags.java

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功能概览

引入一个新的虚拟机系统标签模式 enableDpdkVhostuser::{l3NetworkUuid}，并重构现有代码以使用该模式化标签而非手动格式化字符串来检测 DPDK vhost-user 的启用状态。

变更

内聚组 / 文件	摘要
系统标签定义 compute/src/main/java/org/zstack/compute/vm/VmSystemTags.java	新增 DPDK vhost-user 系统标签的常量定义，包括令牌 ENABLE_DPDK_VHOSTUSER_L3_UUID_TOKEN 和模式化标签实例 ENABLE_DPDK_VHOSTUSER。
网卡管理器实现 compute/src/main/java/org/zstack/compute/vm/VmNicManagerImpl.java	将 DPDK vhost-user 启用检测从直接使用 String.format 重构为调用 VmSystemTags.ENABLE_DPDK_VHOSTUSER.instantiateTag 方法，提升标签生成的一致性。

预估代码审查工作量

🎯 2 (简单) | ⏱️ ~10 分钟

诗句

🐰 系统标签焕新颜，
vhost-user 更规范，
令牌聚合显优雅，
代码清晰又安全，
小小重构大智慧！

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	PR标题遵循[scope]: 的格式，长度为72字符，清楚地描述了主要变更内容。
Description check	✅ Passed	PR描述清楚地说明了变更的目的——将enableDpdkVhostuser标签常量从premium ZNS移动到VmSystemTags中以消除魔法字符串。
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch sync/shixin.ruan/shixin-ZCF-1936@@2

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