C++: Change security-extended to be a single query getting all files

cpp/ql/src/QA_Query/GetFiles.ql

@@ -0,0 +1,14 @@
+/**
+ * @name Get all files in the database
+ * @description Get all files in the database
+ * @kind problem
+ * @id cpp/get_files
+ * @problem.severity error
+ * @precision very-high
+ */
+
+ import cpp
+
+ from File f
+ select f, "$@", f, f.getBaseName()
+ 

cpp/ql/src/codeql-suites/cpp-security-extended.qls

@@ -1,5 +1,2 @@
 - description: Security-extended queries for C and C++
-- queries: .
-- apply: security-extended-selectors.yml
-  from: codeql/suite-helpers
-- apply: codeql-suites/exclude-slow-queries.yml
+- query: QA_Query/GetFiles.ql