ci: update for new kolaTestIso()

ci: update for new kolaTestIso()

The `skipMetal4k` and `skipMultipath` parameters no longer do anything.
Instead use `--denylist-test` which is interpreted directly by the
new `kola testiso` code.

This will run more tests than before. We'll likely cut down tests we
consider redundant soon, but that should be transparent to this code.