QL: Run diagnostics and summary metrics in code scanning

Add diagnostics and summary metric queries to the code scanning suite.

ql/ql/src/codeql-suites/ql-code-scanning.qls

@@ -14,6 +14,14 @@
     - error
     - warning
     - recommendation
+- include:
+    kind:
+    - diagnostic
+- include:
+    kind:
+    - metric
+    tags contain:
+    - summary
 - exclude:
     deprecated: //
 - exclude: