Remove unsigned short and IdentifierType arguments from aliases of VectorContainer

[N-Dekker]

Removed the unsigned short template argument from type aliases of VectorContainer in
BayesianClassifierInitializationImageFilter::InitializeMembershipFunctions(). The default (IdentifierType = SizeValueType) is preferred, and does not need to be specified, explicitly.

Removed the IdentifierType template argument from other aliases of VectorContainer, as it is already the default, and it does not need to be specified, explicitly.

[greptile-apps]

Greptile Summary

This change simplifies VectorContainer aliases in SWC and RANSAC code while preserving their default identifier behavior. The Bayesian classifier initialization scratch containers now use the default identifier type, avoiding the former 16-bit capacity limit.

T-Rex validation blocked

A full ITK header compilation and targeted ITK test run could not be completed because this checkout lacks generated itkConfigure.h, a configured build directory, and the required CMake, Ninja, CTest, and Pixi executables.

Confidence Score: 5/5

Safe to merge; the focused C++ validation completed successfully and found no behavioral regression in the changed aliases.

No issues were found. The focused compile-and-run check confirmed that the default VectorContainer identifier supports values beyond the former unsigned short limit, and the updated SWC and RANSAC aliases retain the documented default identifier behavior.

Files Needing Attention: None.

T-Rex Logs

What T-Rex did

• Compared the base and new revision VectorContainer aliases and ran a focused C++17 identifier-capacity test with warnings treated as errors, and confirmed the migrated default identifier is 70,000 while the SWC and RANSAC aliases use the documented default form.
• Disproved the concern that the Bayesian scratch-container migration reintroduces 16-bit overflow; the compile/run probe passed, showing the migrated default identifier exceeds unsigned short and that the aliases map to SizeValueType, while noting that a full ITK template/header compile cannot be run in this checkout due to missing build tools.

_{Ran code and verified through T-Rex}

_{Reviews (1): Last reviewed commit: "STYLE: Remove unsigned short from Vector..." | Re-trigger Greptile}