Fix Coverity hits for PCA (uxlfoundation#3025)

* Delete copy assignment operators.

* Delete copy assignment operators.

* Added user defined destructor.

* Delete copy assignment operator.

* Fixed the assignment operator.

* Fixed formatting.

* Removed comment.

* Canged the Input copy assignment to be deafult.

* Changed the assignment operator to default.

* explicitly set assignment operator to default.

cpp/daal/include/algorithms/pca/pca_explained_variance_batch.h

@@ -109,6 +109,8 @@ class Batch : public daal::algorithms::quality_metric::Batch
         input.set(eigenvalues, other.input.get(eigenvalues));
     }
 
+    ~Batch() = default;
+
     /**
      * Returns the method of the algorithm
      * \return Method of the algorithm

cpp/daal/include/algorithms/pca/pca_types.h

@@ -200,6 +200,7 @@ class DAAL_EXPORT Input : public InputIface
 public:
     Input();
     Input(const Input & other);
+    Input & operator=(const Input & other);
 
     virtual ~Input() {};
 
@@ -556,6 +557,7 @@ class DistributedInput<correlationDense> : public InputIface
 public:
     DAAL_EXPORT DistributedInput();
     DAAL_EXPORT DistributedInput(const DistributedInput & other);
+    DAAL_EXPORT DistributedInput operator=(const DistributedInput & other);
 
     /**
         * Sets input objects for the PCA on the second step in the distributed processing mode

cpp/daal/src/algorithms/pca/pca_input.cpp

@@ -40,7 +40,7 @@ InputIface::InputIface(const InputIface & other) : daal::algorithms::Input(other
 
 Input::Input() : InputIface(lastInputDatasetId + 1) {};
 Input::Input(const Input & other) : InputIface(other) {}
-
+Input & Input::operator=(const Input & other) = default;
 /**
 * Returns the input object of the PCA algorithm
  * \param[in] id    Identifier of the input object

cpp/daal/src/algorithms/pca/pca_result_impl.h

@@ -44,6 +44,7 @@ class ResultImpl : public data_management::DataCollection
     bool isWhitening;
     ResultImpl(const size_t n) : DataCollection(n), isWhitening(false) {}
     ResultImpl(const ResultImpl & o) : DataCollection(o), isWhitening(o.isWhitening) {}
+    ResultImpl & operator=(const ResultImpl & o) = default;
     virtual ~ResultImpl() {};
 
     /**