[dv/kmac] Increase test timeout min
[dv/kmac] Increase test timeout min

This PR increases the test runttime timeout limit to 2 hours for the
following tests:
kmac_masked_test_vectors_shake_128
kmac_masked_test_vectors_shake_256

Signed-off-by: Cindy Chen <399ad771a111eac8923348b1e2af093034e5d4f1@opentitan.org>

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