DNI: testing all metal compute tests on CI

[jkwak-work]

This PR is intented to run all CI tests for Metal compute test. It is CI testing only and not for an actual merge.

Closes #4291

This change is generated by a following shell script

for f in $(find tests -name '*.slang')
do
    sed -i 's|DISABLE_TEST\(.*\)-mtl\(.*\)|TEST\1-mtl\2|' "$f"
done