[AMD] Fix CI - unit-test-backend-1-gpu-amd-mi35x and unit-test-backend-2-gpu-amd, stage-b-test-small-1-gpu-amd (#16675)

Co-authored-by: Bingxu Chen <bingxche@amd.com>

test/registered/mla/test_mla.py

@@ -16,7 +16,7 @@ from sglang.test.test_utils import (
 register_cuda_ci(est_time=194, suite="stage-b-test-small-1-gpu")
 register_amd_ci(
     est_time=242,
-    suite="stage-a-test-1",
+    suite="stage-b-test-small-1-gpu-amd",
     disabled="see https://github.com/sgl-project/sglang/issues/13107",
 )
 

test/registered/mla/test_mla_deepseek_v3.py

@@ -19,7 +19,7 @@ from sglang.test.test_utils import (
 register_cuda_ci(est_time=442, suite="stage-b-test-small-1-gpu")
 register_amd_ci(
     est_time=221,
-    suite="stage-a-test-1",
+    suite="stage-b-test-small-1-gpu-amd",
     disabled="see https://github.com/sgl-project/sglang/issues/12574",
 )