Strawberry Perl may be in the `PATH` to provide `perl`, but it also
comes with a `pkg-config` tool that is unrelated to normal MinGW
distributions.  Since commit c6efbd78 (MSVC: Teach find_library to
consider the 'libfoo.a' naming convention, 2024-01-19, v3.29.0-rc1~91^2)
we need to avoid searching Strawberry Perl's `.../c/lib` directory, so
do not let its `pkg-config` point us there.

Fixes: #25820
Issue: #23975