Test in t/year_imports.t writes to a fixed filename (Foo.pm) in a public temporary directory

[jfisher92]

The test "test_module_true_for" writes the to File::Spec->tmpdir . "/Foo.pm". If multiple users try to install the module at the same time, this can cause the installation to fail, leaving the Foo.pm file in /tmp.

This test is new in 2dba0abd

To reproduce: run "unset TMP TMPDIR; cpanm C/CH/CHROMATIC/Modern-Perl-1.20241001.tar.gz" under two different users on the same system at the same time.