Refactor: Modularize ApiResponseHelper#createUsageResponse

[PrashantBhanage]

Fixes #11635

Description

This PR addresses the technical debt in ApiResponseHelper#createUsageResponse(Usage) by modularizing the 530-line method.

• Extracted the 500+ line switch/if-else block into a main dispatcher method populateUsageTypeSpecificDetails.
• Created 18 individual private helper methods for each specific UsageType to improve maintainability and readability.
• Introduced a UsageResourceDetails container class to safely manage and return resourceId and resourceType state for tag lookups.
• Verified zero business logic changes; strictly structural refactoring.

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):

N/A (Pure backend refactoring)

How Has This Been Tested?

Ran a successful clean compile locally to verify no structural or syntax breaks:
mvn -pl server -DskipTests clean compile
Passed all local Checkstyle validations.

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

This is a pure structural refactor. Carefully verified that no business logic, string formatting, or calculations were altered. I am relying on the existing automated CI test suites to ensure data integrity and backward compatibility remain strictly intact.

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[sureshanaparti]

@blueorangutan package

[blueorangutan]

@sureshanaparti 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.

[codecov]

Codecov Report

❌ Patch coverage is 1.44928% with 408 lines in your changes missing coverage. Please review.
✅ Project coverage is 18.94%. Comparing base (82986f6) to head (61cb4ea).

Files with missing lines	Patch %	Lines
...src/main/java/com/cloud/api/ApiResponseHelper.java	1.44%	387 Missing and 21 partials ⚠️

Additional details and impacted files

@@            Coverage Diff            @@
##               main   #13490   +/-   ##
=========================================
  Coverage     18.94%   18.94%           
- Complexity    18363    18369    +6     
=========================================
  Files          6192     6192           
  Lines        556361   556444   +83     
  Branches      67908    67907    -1     
=========================================
+ Hits         105397   105421   +24     
- Misses       439393   439450   +57     
- Partials      11571    11573    +2     

Flag	Coverage Δ
uitests	3.51% <ø> (ø)
unittests	20.15% <1.44%> (+<0.01%)	⬆️

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[blueorangutan]

Packaging result [SF]: ✔️ el8 ✔️ el9 ✔️ el10 ✔️ debian ✔️ suse15. SL-JID 18377