Add API to enable/disable NICs for KVM

[hsato03]

Description

This PR introduces the updateVmNic API, allowing users to enable or disable their VMs network interface cards (NICs).

Currently, this API supports only KVM with the following parameters:

Parameter	Description	Required
nicid	The ID of the NIC that will be updated	Yes
state	Defines the NICs state. Values can be Enabled or Disabled	No

Future updates will extend this API to support additional NIC properties and hypervisors.

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?

All tests were performed using only one NIC in the VM. Furthermore, the results of all tests were obtained using the ip a command executed inside the VM.

N	Test	Result
1	With the VM running, I changed the state of its NIC from Enabled to Disabled	The NIC was DOWN
2	With the VM running, I changed the state of its NIC from Disabled to Enabled	The NIC was UP
3	With the VM stopped, I started it with its NIC in the Enabled state	The NIC was UP
4	With the VM stopped, I started it with its NIC in the Disabled state	The NIC was DOWN

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

[hsato03]

@blueorangutan package

[blueorangutan]

@hsato03 a [SL] Jenkins job has been kicked to build packages. It will be bundled with no SystemVM templates. I'll keep you posted as I make progress.

[blueorangutan]

Packaging result [SF]: ✔️ el8 ✔️ el9 ✔️ el10 ✔️ debian ✔️ suse15. SL-JID 17163

[codecov]

Codecov Report

❌ Patch coverage is 13.61702% with 203 lines in your changes missing coverage. Please review.
✅ Project coverage is 17.94%. Comparing base (93239e0) to head (9c6d9a0).

Files with missing lines	Patch %	Lines
...n/java/com/cloud/vm/VirtualMachineManagerImpl.java	0.00%	52 Missing ⚠️
...cloudstack/api/command/user/vm/UpdateVmNicCmd.java	0.00%	37 Missing ⚠️
...urce/wrapper/LibvirtUpdateVmNicCommandWrapper.java	4.00%	24 Missing ⚠️
...n/java/com/cloud/agent/api/UpdateVmNicCommand.java	0.00%	20 Missing ⚠️
...on/src/main/java/com/cloud/vm/VmWorkUpdateNic.java	0.00%	11 Missing ⚠️
.../src/main/java/com/cloud/vm/UserVmManagerImpl.java	67.74%	7 Missing and 3 partials ⚠️
...pi/src/main/java/com/cloud/agent/api/to/NicTO.java	0.00%	6 Missing ⚠️
api/src/main/java/com/cloud/vm/NicProfile.java	14.28%	6 Missing ⚠️
...rg/apache/cloudstack/api/response/NicResponse.java	0.00%	6 Missing ⚠️
...in/java/com/cloud/agent/api/UpdateVmNicAnswer.java	0.00%	5 Missing ⚠️
... and 10 more

Additional details and impacted files

@@             Coverage Diff              @@
##               main   #12819      +/-   ##
============================================
- Coverage     17.95%   17.94%   -0.01%     
- Complexity    16259    16264       +5     
============================================
  Files          5954     5959       +5     
  Lines        534838   535094     +256     
  Branches      65423    65440      +17     
============================================
+ Hits          96010    96043      +33     
- Misses       428053   428273     +220     
- Partials      10775    10778       +3     

Flag	Coverage Δ
uitests	3.64% <ø> (-0.01%)	⬇️
unittests	19.06% <13.61%> (-0.01%)	⬇️

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