fix coverity issue 1540833 and 1540832 (openvinotoolkit#23635)

### Details:
 - *fix coverity scan  issue1540833 and issue1540832*

### Tickets:
 - *ticket-id*

Author: wangleis

src/plugins/intel_cpu/src/compiled_model.cpp

@@ -250,7 +250,7 @@ ov::Any CompiledModel::get_property(const std::string& name) const {
         const auto stream_mode = config.schedulingCoreType;
         return stream_mode;
     } else if (name == ov::hint::model_distribution_policy) {
-        const auto distribution_policy = config.modelDistributionPolicy;
+        const auto& distribution_policy = config.modelDistributionPolicy;
         return distribution_policy;
     } else if (name == ov::hint::enable_hyper_threading.name()) {
         const bool use_ht = config.enableHyperThreading;

src/plugins/intel_cpu/src/plugin.cpp

@@ -410,7 +410,7 @@ ov::Any Plugin::get_property(const std::string& name, const ov::AnyMap& options)
         const auto core_type = engConfig.schedulingCoreType;
         return core_type;
     } else if (name == ov::hint::model_distribution_policy) {
-        const auto distribution_policy = engConfig.modelDistributionPolicy;
+        const auto& distribution_policy = engConfig.modelDistributionPolicy;
         return distribution_policy;
     } else if (name == ov::hint::enable_hyper_threading) {
         const bool ht_value = engConfig.enableHyperThreading;