add deprecated modifier

Co-authored-by: Asger F <asgerf@github.com>

javascript/ql/src/semmle/javascript/Functions.qll

@@ -82,6 +82,7 @@ class Function extends @function, Parameterized, TypeParameterized, StmtContaine
    *
    * Gets the identifier specifying the name of this function, if any.
    */
+  deprecated
   VarDecl getId() { result = getIdentifier() }
 
   /** Gets the identifier specifying the name of this function, if any. */

javascript/ql/src/semmle/javascript/TypeScript.qll

@@ -12,6 +12,7 @@ class NamespaceDefinition extends Stmt, @namespacedefinition, AST::ValueNode {
    *
    * Gets the identifier naming the namespace.
    */
+  deprecated
   Identifier getId() { result = getIdentifier() }
 
   /**
@@ -186,6 +187,7 @@ class ImportEqualsDeclaration extends Stmt, @importequalsdeclaration {
    *
    * Gets the name under which the imported entity is imported.
    */
+  deprecated
   Identifier getId() { result = getIdentifier() }
 
   /** Gets the name under which the imported entity is imported. */