Remove ROCm 5.6 and add ROCm 6.0 (#5021)

Another follow-up for 2.3 release

tools/scripts/generate_binary_build_matrix.py

@@ -32,7 +32,7 @@
 }
 ROCM_ARCHES_DICT = {
     "nightly": ["5.7", "6.0"],
-    "test": ["5.6", "5.7"],
+    "test": ["5.7", "6.0"],
     "release": ["5.6", "5.7"],
 }