Update Unit Tests in PolarizationEffiency Cor

This is a squashed version of mantidproject#38458

Update Unit Tests in PolarizationEffiency Cor
- wrote unit tests to check that wildes method perform well when spinstates is added
- wrote unit tests to check that fredrik method throws exception when tested with wildes-only properties spinstates and flippers
- wrote unit tests to check that fredrikze method can take AddSpinStateToLog property
- refactored unit tests for maintainability

updated hardcoded strings to use private variables

refactored unit tests to reduce redudancies

Simplify Tests based on code review suggestions
- created efficiency output workspace method to cater for duplication in createEfficiencyWorkspace
- moved functions from setAlgorithmProperties to createAlgorithm method

remove duplication in test_point methods

refactor createEfficiencyOutputWorkspace method