conditional error reporting for vm move failure

[DaanHoogland]

Description

This PR...

Fixes: #13406

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?

[codecov]

Codecov Report

❌ Patch coverage is 33.33333% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 16.26%. Comparing base (e8df87e) to head (6cfbcc8).

Files with missing lines	Patch %	Lines
...e/cloudstack/api/command/admin/vm/AssignVMCmd.java	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff            @@
##               4.20   #13675   +/-   ##
=========================================
  Coverage     16.26%   16.26%           
+ Complexity    13435    13434    -1     
=========================================
  Files          5667     5668    +1     
  Lines        500731   500734    +3     
  Branches      60803    60804    +1     
=========================================
+ Hits          81430    81444   +14     
+ Misses       410197   410185   -12     
- Partials       9104     9105    +1     

Flag	Coverage Δ
uitests	4.14% <ø> (ø)
unittests	17.12% <33.33%> (+<0.01%)	⬆️

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[sonarqubecloud]

Quality Gate passed

Issues
1 New issue
0 Accepted issues

Measures
0 Security Hotspots
6.7% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud