Use one stage for all tests.

tests/tests_regression/DDR3/ci.yml

@@ -1,6 +1,6 @@
 # DDR3 Dual Rank Test with Staggered Power Down Policy and Scheduler FrFcfsGrp
-example_DDR3:
-    stage: test_DDR3
+test_DDR3:
+    stage: test
     needs:
         - build
     script:

tests/tests_regression/DDR4/ci.yml

@@ -1,6 +1,6 @@
 # DDR4 with 4 bank groups, flexible rankwise refresh and FrFcfs scheduler:
-example_DDR4:
-    stage: test_DDR4
+test_DDR4:
+    stage: test
     needs:
         - build
     script:

tests/tests_regression/HBM2/ci.yml

@@ -1,5 +1,5 @@
-example_HBM2:
-    stage: test_HBM2
+test_HBM2:
+    stage: test
     needs:
         - build
     script: 

tests/tests_regression/LPDDR4/ci.yml

@@ -1,6 +1,6 @@
 # LPDDR4 with Bankwise Flexible Refresh and FIFO Scheduler:
-example_LPDDR4:
-    stage: test_LPDDR4
+test_LPDDR4:
+    stage: test
     needs:
         - build
     script: