NPE correction when informing removed project in the 'listProjectRoles'

[Tonitzpp]

Description

Currently, when using the listProjectRoles API, passing the projectid parameter of a removed project results in an NPE. This PR changes this behavior to return the message Failed to find project by ID instead.

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

• Major
• Minor

Bug Severity

• BLOCKER
• Critical
• Major
• Minor
• Trivial

Screenshots (if appropriate):

Before the changes

After the changes

How Has This Been Tested?

To perform the tests, a test project was created along with a project role. The project was deleted and the listProjectRoles API was called passing the ID of the project role. This showed the new message.

[codecov]

Codecov Report

❌ Patch coverage is 0% with 6 lines in your changes missing coverage. Please review.
✅ Project coverage is 17.94%. Comparing base (3bd5410) to head (86e0552).
⚠️ Report is 100 commits behind head on main.

Files with missing lines	Patch %	Lines
...command/admin/acl/project/ListProjectRolesCmd.java	0.00%	3 Missing ⚠️
.../apache/cloudstack/acl/ProjectRoleManagerImpl.java	0.00%	3 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main   #13022      +/-   ##
============================================
- Coverage     18.02%   17.94%   -0.08%     
- Complexity    16450    16499      +49     
============================================
  Files          5968     6019      +51     
  Lines        537086   540750    +3664     
  Branches      65961    66255     +294     
============================================
+ Hits          96820    97061     +241     
- Misses       429346   432749    +3403     
- Partials      10920    10940      +20     

Flag	Coverage Δ
uitests	3.53% <ø> (-0.01%)	⬇️
unittests	19.10% <0.00%> (-0.10%)	⬇️

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