Fix NSX SDK list handling to fetch all paginated results

[wolfchkov]

Fix for NSX plugin.

Description

NSX SDK list operations are pageable: the API returns a non-null and non-empty cursor field when more pages are available. The previous implementation only fetched the first page and ignored pagination.

This change updates the list retrieval flow to:

• follow the cursor chain until no further pages exist
• accumulate items from all pages
• return a single merged result to the caller

This ensures that list operations return the complete dataset rather than just the first page.

Types of changes

• [ ] Breaking change (fix or feature that would cause existing functionality to change)
• [ ] New feature (non-breaking change which adds functionality)
• [ x] 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
• [x ] Test (unit or integration test code)

Feature/Enhancement Scale or Bug Severity

Feature/Enhancement Scale

• [ ] Major
• [ x] Minor

Bug Severity

• [ ] BLOCKER
• [ x] 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?

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[codecov[bot]]

Codecov Report

:x: Patch coverage is 25.85034% with 109 lines in your changes missing coverage. Please review. :white_check_mark: Project coverage is 17.46%. Comparing base (3c64847) to head (070b956). :warning: Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
...va/org/apache/cloudstack/service/NsxApiClient.java	0.00%	106 Missing :warning:
...va/org/apache/cloudstack/service/PagedFetcher.java	92.68%	0 Missing and 3 partials :warning:

Additional details and impacted files

@@             Coverage Diff              @@
##              main   #12241       +/-   ##
============================================
+ Coverage     3.58%   17.46%   +13.88%     
- Complexity       0    15525    +15525     
============================================
  Files          445     5914     +5469     
  Lines        37552   529493   +491941     
  Branches      6914    64685    +57771     
============================================
+ Hits          1347    92488    +91141     
- Misses       36039   426584   +390545     
- Partials       166    10421    +10255     

Flag	Coverage Δ
uitests	3.58% <ø> (ø)
unittests	18.52% <25.85%> (?)

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[Pearl1594]

@blueorangutan package

[blueorangutan]

@Pearl1594 a [SL] Jenkins job has been kicked to build packages. It will be bundled with KVM, XenServer and VMware SystemVM templates. I'll keep you posted as I make progress.

[wolfchkov]

This fix is currently undergoing testing. When the test results are ready, I will update the description accordingly.

[blueorangutan]

Packaging result [SF]: ✔️ el8 ✔️ el9 ✔️ el10 ✔️ debian ✔️ suse15. SL-JID 16006