First stage of the AUTO-MULTI merge: redirecting AUTO to the MULTI device plugin (#7037)

* Redirect -d AUTO to MULTI device plugin

Signed-off-by: Shoujiang Ma <shoujiang.ma@intel.com>

* Modify AUTO tests with MULTI config

Signed-off-by: Shoujiang Ma <shoujiang.ma@intel.com>

* Fix CI

Signed-off-by: Shoujiang Ma <shoujiang.ma@intel.com>

* Fix bug: CVS-62424

Signed-off-by: Shoujiang Ma <shoujiang.ma@intel.com>

* Add some tests for AUTO

Signed-off-by: Shoujiang Ma <shoujiang.ma@intel.com>

* Add select device logic to MULTI

Signed-off-by: Shoujiang Ma <shoujiang.ma@intel.com>

* Fix extract device name bug

Signed-off-by: Shoujiang Ma <shoujiang.ma@intel.com>

* Address reviewer's comment

Signed-off-by: Shoujiang Ma <shoujiang.ma@intel.com>

* Delete AUTO plugin source code

Signed-off-by: Shoujiang Ma <shoujiang.ma@intel.com>

inference-engine/samples/benchmark_app/main.cpp

@@ -212,6 +212,9 @@ int main(int argc, char* argv[]) {
         bool perf_counts = false;
         // Update config per device according to command line parameters
         for (auto& device : devices) {
+            if (device == "AUTO") {
+                continue;
+            }
             if (!config.count(device))
                 config[device] = {};
             std::map<std::string, std::string>& device_config = config.at(device);