Fix infrastructure leak on exception while attaching/detaching volumes in VMware

[erikbocks]

Description

In VMware environments, when a VM resides on a host in the Disconnected state, and an attach/detach volume operation is initiated, an exception containing infrastructure data is thrown. This PR addresses the issue by handling the AgentUnavailableException separately. The exception will still appear in the application logs, allowing operators to troubleshoot effectively.

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?

I made the following tests, in my local lab:

1. Created a new VM and attached a volume to it.
2. Shutdown my VMware host.
3. Tried to attach a new volume, and the exception containing the infrastructure data was thrown.
4. Tried to detach the previously attached volume, and the same exception was thrown.
5. Built and installed CloudStack's packages with my fix.
6. Repeated the same processes, and validated that the new error message contained no infrastructure data.

[DaanHoogland]

clgtm

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 3.99%. Comparing base (39c5641) to head (9cb36d8).
Report is 31 commits behind head on main.

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HEAD has 1 upload less than BASE

Flag	BASE (39c5641)	HEAD (9cb36d8)
unittests	1	0

Additional details and impacted files

@@              Coverage Diff              @@
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- Coverage     16.40%    3.99%   -12.41%     
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  Files          5692      401     -5291     
  Lines        501976    32654   -469322     
  Branches      60795     5791    -55004     
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- Hits          82369     1306    -81063     
+ Misses       410449    31198   -379251     
+ Partials       9158      150     -9008     

Flag	Coverage Δ
uitests	3.99% <ø> (-0.01%)	⬇️
unittests	?

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