LINK_OPTIONS: Add new family of properties

This family enable to manage link flags

Three new properties:
* directory property: LINK_OPTIONS
* target properties: LINK_OPTIONS and INTERFACE_LINK_OPTIONS

Two new commands
* add_link_options(): to populate directory property
* target_link_options(): to populate target properties

Fixes: #16543

Source/cmAddLinkOptionsCommand.cxx

@@ -0,0 +1,20 @@
+/* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
+   file Copyright.txt or https://cmake.org/licensing for details.  */
+#include "cmAddLinkOptionsCommand.h"
+
+#include "cmMakefile.h"
+
+class cmExecutionStatus;
+
+bool cmAddLinkOptionsCommand::InitialPass(std::vector<std::string> const& args,
+                                          cmExecutionStatus&)
+{
+  if (args.empty()) {
+    return true;
+  }
+
+  for (std::string const& i : args) {
+    this->Makefile->AddLinkOption(i);
+  }
+  return true;
+}