jenkins: spilt car tests in two steps (#31346)

fix

Jenkinsfile

@@ -272,8 +272,9 @@ node {
       'car tests': {
         pcStage("car tests") {
           sh label: "build", script: "selfdrive/manager/build.py"
-          sh label: "run car tests", script: "cd selfdrive/car/tests && MAX_EXAMPLES=300 INTERNAL_SEG_CNT=300 FILEREADER_CACHE=1 \
+          sh label: "test_models", script: "INTERNAL_SEG_CNT=300 FILEREADER_CACHE=1 INTERNAL_SEG_LIST=selfdrive/car/tests/test_models_segs.txt \
-              INTERNAL_SEG_LIST=selfdrive/car/tests/test_models_segs.txt pytest test_models.py test_car_interfaces.py"
+                                            pytest selfdrive/car/tests/test_models.py"
+          sh label: "test_car_interfaces", script: "MAX_EXAMPLES=300 pytest selfdrive/car/tests/test_car_interfaces.py"
         }
       },