Reenable `test/Hexagon/Plugin/ConfigFile/DefaultINIConfigFilePathTest/DefaultINIConfigFilePathTest.test` on windows

[Ris-Bali]

cp %p/../Inputs/test.ini "%llvmobjroot/etc/ELD/Plugins/ConfigFile/default.ini"

There is a LIT check mismatch at present that relates to finding plugin configuration INI file defualt.ini

This test was temporarily disabled in #729