C++: move consistency queries into the open-source repo

These queries live next to the C++ QL tests they check, so that `codeql test
run --consistency-queries` can find them without an internal checkout.

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>

Author: redsun82

cpp/ql/consistency-queries/badLocations.ql

@@ -0,0 +1,9 @@
+import cpp
+
+// Locations should either be :0:0:0:0 locations (UnknownLocation, or
+// a whole file), or all 4 fields should be positive.
+from Location l
+where
+  [l.getStartLine(), l.getEndLine(), l.getStartColumn(), l.getEndColumn()] != 0 and
+  [l.getStartLine(), l.getEndLine(), l.getStartColumn(), l.getEndColumn()] < 1
+select l

cpp/ql/consistency-queries/nullInToString.ql

@@ -0,0 +1,5 @@
+import cpp
+
+from Element e
+where e.toString().matches("%(null)%")
+select e

cpp/ql/consistency-queries/qlpack.yml

@@ -0,0 +1,5 @@
+name: codeql/cpp-consistency-queries
+groups: [cpp, test, consistency-queries]
+dependencies:
+  codeql/cpp-all: ${workspace}
+extractor: cpp

cpp/ql/consistency-queries/unusedLocations.ql

@@ -0,0 +1,10 @@
+import cpp
+
+from Location l
+where
+  not any(Element e).getLocation() = l and
+  not any(LambdaCapture lc).getLocation() = l and
+  not any(MacroAccess ma).getActualLocation() = l and
+  not any(NamespaceDeclarationEntry nde).getBodyLocation() = l and
+  not any(XmlLocatable xml).getLocation() = l
+select l

cpp/ql/consistency-queries/variableDeclarationsWithoutTypes.ql

@@ -0,0 +1,5 @@
+import cpp
+
+from VariableDeclarationEntry i
+where not exists(i.getType())
+select i

cpp/ql/consistency-queries/variablesWithoutTypes.ql

@@ -0,0 +1,5 @@
+import cpp
+
+from Variable i
+where not exists(i.getType())
+select i