[C++][CI] EnsureAlignment.Buffer fails on test-build-vcpkg-win

[raulcd]

Describe the bug, including details regarding any error messages, version, and platform.

Since #35565 was merged and EnsureAlignment.Buffer was added the job test-build-vcpkg-win has been failing with:

 [  FAILED  ] 1 test, listed below:
[  FAILED  ] EnsureAlignment.Buffer

 1 FAILED TEST
  YOU HAVE 1 DISABLED TEST

Component(s)

C++, Continuous Integration

[raulcd]

The error seems to be on the alignment itself:

D:/a/crossbow/crossbow/arrow/cpp/src/arrow/util/align_util_test.cc(204): error: Value of: util::CheckAlignment(*realigned_large, 256)
  Actual: false
Expected: true

cc @westonpace