optimize: cache common entity lookups in CallContext during VM deployment

[shwstppr]

Description

This change introduces caching of frequently accessed entities in CallContext to reduce repeated database lookups during VM deployment. By reusing cached values for common entries, the deployment workflow becomes more efficient, reducing overhead and improving overall performance.

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?

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

[codecov]

Codecov Report

❌ Patch coverage is 40.00000% with 123 lines in your changes missing coverage. Please review.
✅ Project coverage is 17.37%. Comparing base (3d6ec29) to head (7f3a394).

Files with missing lines	Patch %	Lines
...a/com/cloud/network/router/CommandSetupHelper.java	20.00%	28 Missing ⚠️
...c/main/java/com/cloud/utils/db/GenericDaoBase.java	0.00%	19 Missing ⚠️
...om/cloud/network/element/VirtualRouterElement.java	23.80%	16 Missing ⚠️
.../apache/cloudstack/context/RequestEntityCache.java	47.82%	5 Missing and 7 partials ⚠️
...ain/java/com/cloud/storage/StorageManagerImpl.java	44.44%	10 Missing ⚠️
...n/java/com/cloud/capacity/CapacityManagerImpl.java	0.00%	8 Missing ⚠️
...om/cloud/deploy/DeploymentPlanningManagerImpl.java	80.95%	5 Missing and 3 partials ⚠️
...torage/allocator/AbstractStoragePoolAllocator.java	0.00%	4 Missing ⚠️
...n/java/com/cloud/vm/VirtualMachineManagerImpl.java	40.00%	3 Missing ⚠️
...ava/org/apache/cloudstack/context/CallContext.java	50.00%	2 Missing ⚠️
... and 7 more

Additional details and impacted files

@@             Coverage Diff              @@
##               main   #11549      +/-   ##
============================================
+ Coverage     17.36%   17.37%   +0.01%     
- Complexity    15237    15251      +14     
============================================
  Files          5888     5889       +1     
  Lines        525741   525846     +105     
  Branches      64164    64181      +17     
============================================
+ Hits          91274    91347      +73     
- Misses       424167   424171       +4     
- Partials      10300    10328      +28     

Flag	Coverage Δ
uitests	3.63% <ø> (ø)
unittests	18.41% <40.00%> (+0.01%)	⬆️

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