[infra] Use ELF on VM AOT NNBD simarm64 builder

Change-Id: Ie8584ff46ecb6e818bdc8a7a5c4e1ef5f015d7c3
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/156520
Reviewed-by: William Hesse <whesse@google.com>

Author: athomas

tools/bots/test_matrix.json

@@ -707,7 +707,7 @@
         "builder-tag": "canary"
       }
     },
-    "dartkp-weak-asserts-(linux|mac)-(debug|product|release)-(simarm64|x64)": {
+    "dartkp-weak-asserts-(linux|mac)-(debug|product|release)-x64": {
       "options": {
         "enable-experiment": [
           "non-nullable"
@@ -722,6 +722,22 @@
         "builder-tag": "vm_nnbd"
       }
     },
+    "dartkp-weak-asserts-(linux|mac)-(debug|product|release)-simarm64": {
+      "options": {
+        "enable-experiment": [
+          "non-nullable"
+        ],
+        "gen-kernel-options": [
+          "--no-sound-null-safety"
+        ],
+        "enable-asserts": true,
+        "use-elf": true,
+        "vm-options": [
+          "--no-sound-null-safety"
+        ],
+        "builder-tag": "vm_nnbd"
+      }
+    },
     "dartkp-weak-asserts-win-(debug|product|release)-(simarm64|x64)": {
       "options": {
         "enable-experiment": [
@@ -761,7 +777,7 @@
         "builder-tag": "vm_nnbd"
       }
     },
-    "dartkp-strong-(linux|mac)-(debug|product|release)-(simarm64|x64)": {
+    "dartkp-strong-(linux|mac)-(debug|product|release)-x64": {
       "options": {
         "enable-experiment": [
           "non-nullable"
@@ -775,6 +791,21 @@
         "builder-tag": "vm_nnbd"
       }
     },
+    "dartkp-strong-(linux|mac)-(debug|product|release)-simarm64": {
+      "options": {
+        "enable-experiment": [
+          "non-nullable"
+        ],
+        "gen-kernel-options": [
+          "--sound-null-safety"
+        ],
+        "use-elf": true,
+        "vm-options": [
+          "--sound-null-safety"
+        ],
+        "builder-tag": "vm_nnbd"
+      }
+    },
     "dartkp-strong-win-(debug|product|release)-(simarm64|x64)": {
       "options": {
         "use-elf": true,