Add codeql exclusion list (#8158)

CodeQL.yml

@@ -0,0 +1,12 @@
+path_classifiers:
+  library:
+    - "src/**/vendored_sdks/"
+    - "src/k8s-extension/azext_k8s_extension/partner_extensions/*.py"
+    - src/virtual-wan/azext_vwan/custom.py
+    - src/k8s-configuration/azext_k8s_configuration/validators.py
+    - src/connectedk8s/azext_connectedk8s/custom.py
+    - src/alias/azext_alias/custom.py
+    - src/alias/azext_alias/alias.py
+    - src/dataprotection/azext_dataprotection/manual/helpers.py
+    - src/containerapp/azext_containerapp/_utils.py
+    - "src/**/tests/"