Disable o3de-extras automated testing for stabilization (#16801)

Signed-off-by: Mike Chang <[email protected]>

.automatedtesting.json

@@ -12,10 +12,5 @@
     "ENABLE_GEMS": [
     ],
     "REPOS": [
-        {
-            "NAME": "o3de-extras",
-            "URL": "https://github.com/o3de/o3de-extras.git",
-            "BRANCH": "development"
-        }
     ]
 }

.gitignore

@@ -14,6 +14,7 @@ CMakeUserPresets.json
 [Uu]ser/
 FrameCapture/**
 .DS_Store
+.automatedtesting.json
 user*.cfg
 client*.cfg
 server*.cfg