zephyr: Fix applying custom overlays for MESH

More generic name shall be later on the list since first match is
used.

Author: sjanc

autopts/bot/iut_config/zephyr.py

@@ -157,15 +157,6 @@
         ]
     },
 
-    "overlay-mesh.conf": {
-        "overlay": {
-            # The overlay file exists in zephyr repo. Leave this empty.
-        },
-        "test_cases": [
-            'MESH'
-        ]
-    },
-
     "mesh_rpr_persistent_storage.conf": {
         "pre_overlay": "overlay-mesh.conf",
         "overlay": {
@@ -298,6 +289,15 @@
         ]
     },
 
+    "overlay-mesh.conf": {
+        "overlay": {
+            # The overlay file exists in zephyr repo. Leave this empty.
+        },
+        "test_cases": [
+            'MESH'
+        ]
+    },
+
     "br_sec_sc_only.conf": {
         "overlay": {
             'CONFIG_BT_CLASSIC': 'y',