Added StaticStateManipulatorTest

[sonalgaud12]

This PR addresses #522, by adding test for StaticStateManipulator which comes utilities class

Added Test:

shouldProvideConsistentSingletonInstance

• Validates singleton returns same instance consistently

shouldBeThreadSafeWhenAccessingSingleton

• Ensures thread-safe singleton access across multiple concurrent threads

shouldResetAllRegisteredManipulators

• Confirms reset functionality works for multiple registered manipulators

shouldRegisterManipulatorsThreadSafely

• Validates thread-safe registration of static field manipulators

shouldHandleResetWithNoManipulators

• Checks graceful reset when no manipulators are registered

Result:

Test Coverage:

[sonalgaud12]

Requesting review @wbrunette