COMP: Missing ITK_FUTURE_LEGACY_REMOVE in VariableLengthVector

[SimonRit]

Fixes compile errors

/home/sritrtk/dashboard_tests/ITK-main/Modules/Core/Common/include/itkVariableLengthVector.hxx:203:1: error: no declaration matches 'TValue* itk::VariableLengthVector<TValue>::AllocateElements(itk::VariableLengthVector<TValue>::ElementIdentifier) const'
  203 | VariableLengthVector<TValue>::AllocateElements(ElementIdentifier size) const
      | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
[CTest: warning matched] /home/sritrtk/dashboard_tests/ITK-main/Modules/Core/Common/include/itkVariableLengthVector.hxx:203:1: note: no functions named 'TValue* itk::VariableLengthVector<TValue>::AllocateElements(itk::VariableLengthVector<TValue>::ElementIdentifier) const'

See https://my.cdash.org/index.php?project=RTK&date=2026-01-01.

PR Checklist

• No API changes were made (or the changes have been approved)
• No major design changes were made (or the changes have been approved)
• Added test (or behavior not changed)
• Updated API documentation (or API not changed)
• Added license to new files (if any)
• Added Python wrapping to new files (if any) as described in ITK Software Guide Section 9.5
• Added ITK examples for all new major features (if any)

Refer to the ITK Software Guide for
further development details if necessary.

[N-Dekker]

Oops, my fault! Thanks @SimonRit 👍

• I see, the problem was introduced by PR #5710 commit f080d4f