Fixes VM snapshot usage records that are attributed to the old snapshot

[harikrishna-patnala]

Description

This PR fixes #13921

Here we used the right usage record to get the actual snapshot details.

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)

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 0% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 18.00%. Comparing base (2e63c60) to head (0d25a22).

Files with missing lines	Patch %	Lines
.../com/cloud/usage/parser/VMSnapshotUsageParser.java	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff            @@
##               4.22   #14308   +/-   ##
=========================================
  Coverage     18.00%   18.00%           
- Complexity    16219    16220    +1     
=========================================
  Files          5936     5936           
  Lines        535716   535716           
  Branches      65596    65596           
=========================================
  Hits          96459    96459           
+ Misses       428268   428266    -2     
- Partials      10989    10991    +2     

Flag	Coverage Δ
uitests	4.02% <ø> (ø)
unittests	19.08% <0.00%> (ø)

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[weizhouapache]

code makes sense