[VM/Testing] - Turn on testing in strong NNBD mode.

Change-Id: I272de0ca65afb4327d9ec6457c7e514fb1c73449
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/139030
Reviewed-by: Ben Konyi <[email protected]>
Commit-Queue: Siva Annamalai <[email protected]>

Author: a-siva

tools/bots/test_matrix.json

@@ -1303,15 +1303,15 @@
           ]
         },
         {
-          "name": "vm weak legacy tests with asserts",
+          "name": "vm legacy tests in weak mode with asserts",
           "arguments": [
             "-ndartkp-weak-asserts-${system}-${mode}-${arch}"
           ],
           "fileset": "vm-kernel-nnbd",
           "shards": 6
         },
         {
-          "name": "vm co19_2 tests",
+          "name": "vm legacy tests(co19_2) in weak mode with asserts",
           "arguments": [
             "-ndartkp-weak-asserts-${system}-${mode}-${arch}",
             "co19_2"
@@ -1320,14 +1320,24 @@
           "shards": 10
         },
         {
-          "name": "vm weak tests with asserts",
+          "name": "vm nnbd tests in weak mode with asserts",
           "arguments": [
             "-ndartkp-weak-asserts-${system}-${mode}-${arch}",
             "ffi",
             "language",
             "lib/mirrors",
             "standalone/io"
           ]
+        },
+	{
+          "name": "vm nnbd tests in strong mode",
+          "arguments": [
+            "-ndartkp-strong-${system}-${mode}-${arch}",
+            "ffi",
+            "language",
+            "lib/mirrors",
+            "standalone/io"
+          ]
         }
       ]
     },
@@ -1696,15 +1706,15 @@
           ]
         },
         {
-          "name": "vm weak legacy tests with asserts",
+          "name": "vm legacy tests in weak mode with asserts",
           "arguments": [
             "-ndartk-weak-asserts-${system}-${mode}-${arch}"
           ],
           "fileset": "vm-kernel-nnbd",
           "shards": 6
         },
         {
-          "name": "vm weak legacy tests(co19_2) with asserts",
+          "name": "vm legacy tests(co19_2) in weak mode with asserts",
           "arguments": [
             "-ndartk-weak-asserts-${system}-${mode}-${arch}",
             "co19_2"
@@ -1713,14 +1723,24 @@
           "shards": 6
         },
         {
-          "name": "vm weak tests with asserts",
+          "name": "vm nnbd test in weak mode with asserts",
           "arguments": [
             "-ndartk-weak-asserts-${system}-${mode}-${arch}",
             "ffi",
             "language",
             "lib/mirrors",
             "standalone/io"
           ]
+        },
+        {
+          "name": "vm nnbd tests in strong mode",
+          "arguments": [
+            "-ndartk-strong-${system}-${mode}-${arch}",
+            "ffi",
+            "language",
+            "lib/mirrors",
+            "standalone/io"
+          ]
         }
       ]
     },