[sw] Avoid using word "sanity" in SW Tree

This follows to match changes suggested by the DV team, and implemented
in lowRISC/opentitan#4248.

Signed-off-by: Sam Elliott <selliott@lowrisc.org>
diff --git a/test/systemtest/config.py b/test/systemtest/config.py
index c953da4..c12d38f 100644
--- a/test/systemtest/config.py
+++ b/test/systemtest/config.py
@@ -40,25 +40,25 @@
         "name": "dif_otp_ctrl_smoketest",
     },
     {
-        "name": "dif_plic_sanitytest",
+        "name": "dif_plic_smoketest",
     },
     {
-        "name": "dif_rstmgr_sanitytest",
+        "name": "dif_rstmgr_smoketest",
     },
     {
-        "name": "dif_rv_timer_sanitytest",
+        "name": "dif_rv_timer_smoketest",
     },
     {
-        "name": "dif_uart_sanitytest",
+        "name": "dif_uart_smoketest",
     },
     {
         "name": "flash_ctrl_test",
     },
     {
-        "name": "pmp_sanitytest_napot",
+        "name": "pmp_smoketest_napot",
     },
     {
-        "name": "pmp_sanitytest_tor",
+        "name": "pmp_smoketest_tor",
     },
     {
         "name": "sha256_test",