[ov_subgraphs_dumper_tests] Fix memory leaks (openvinotoolkit#24751)

### Details:
 - *item1*
 - *...*

### Tickets:
 - *CVS-134419*

src/tests/functional/plugin/conformance/subgraphs_dumper/src/matchers/single_op/single_op.cpp

@@ -41,7 +41,8 @@ bool SingleOpMatcher::match_inputs(const std::shared_ptr<ov::Node> &node,
     if (node->get_input_size() != ref->get_input_size()) {
         return false;
     }
-    const std::vector<size_t> &ignored_ports = get_config(node)->ignored_ports;
+    const auto &cfg = get_config(node);
+    const std::vector<size_t> &ignored_ports = cfg->ignored_ports;
 
     for (size_t port_id = 0; port_id < node->get_input_size(); ++port_id) {
         if (std::find(ignored_ports.begin(), ignored_ports.end(), port_id) != ignored_ports.end()) {

src/tests/functional/plugin/conformance/subgraphs_dumper/src/matchers/subgraph/repeat_pattern.cpp

@@ -213,7 +213,7 @@ RepeatPatternExtractor::get_patterns_by_nodes(const std::vector<size_t>& start_o
         });
 
         // exclude not repeated pattern
-        while (potential_patterns.rbegin()->size() < 2 && !potential_patterns.empty()) {
+        while (!potential_patterns.empty() && potential_patterns.rbegin()->size() < 2) {
             potential_patterns.pop_back();
         }
         patterns = potential_patterns;