Move internal Actions into .github/actions

This is a more standard location for these custom Actions.

.github/actions/check-sarif/action.yml

@@ -0,0 +1,20 @@
+name: Check SARIF
+description: Checks a SARIF file to see if certain queries were run and others were not run.
+inputs:
+  sarif-file:
+    required: true
+    description: The SARIF file to check
+
+  queries-run:
+    required: true
+    description: |
+      Comma separated list of query ids that should be included in this SARIF file.
+
+  queries-not-run:
+    required: true
+    description: |
+      Comma separated list of query ids that should NOT be included in this SARIF file.
+
+runs:
+  using: node12
+  main: index.js