UI: Fix VNF NIC mapping network select always disabled

[Gia-Bursulaia]

Remove incorrect disabled attribute from VnfNicsSelection.vue. The attribute was a plain string instead of Vue binding, causing the select to always be disabled regardless of state.

Description

Fixes VNF NIC mapping network select dropdown which was permanently disabled.

The disabled attribute was written as a plain HTML string instead of a Vue reactive binding (missing : prefix). In Vue/Ant Design, any non-empty string is treated as truthy, making the select always disabled regardless of state.

Tested on CloudStack 4.22.1.0 with KVM hypervisor.

Types of changes

• Breaking change (fix or feature that would cause existing functionality to change)
• New feature (non-breaking change which adds functionality)
• Bug fix (non-breaking change which fixes an issue)
• Enhancement (improves an existing feature and functionality)
• Cleanup (Code refactoring and cleanup, that may add test cases)
• Build/CI
• Test (unit or integration test code)

Feature/Enhancement Scale or Bug Severity

Feature/Enhancement Scale

• Major
• Minor

Bug Severity

• BLOCKER
• Critical
• Major
• Minor
• Trivial

Screenshots (if appropriate):

How Has This Been Tested?

How did you try to break this feature and the system with this change?