[bazel] Tag failiing tests to allow exclusion
[bazel] Tag failiing tests to allow exclusion

cw310 and verilator tags no longer optional defaults but are instead
automatically appended.

bazel test can verify passing verilator targets with
--test_tag_filters=-cw310,-failing_verilator

failing gpio test generates traces to demonstrate capability and aid
debugging.

Signed-off-by: Drew Macrae <32d48ac45113625c0a04afe7343eae478a303684@google.com>

lowRISC/opentitan,lowRISC/opentitan,lowRISC/opentitan,lowRISC/opentitan,lowRISC/opentitan,lowRISC/opentitan