Configure CheckStyle rule for empty catch blocks

This commit configures a new CheckStyle rule that fails for empty
"catch" blocks, unless the exception is named "ignored" or "expected".

This also fixes the remaining instances missed by the previous commit.

Closes gh-35047

spring-core/src/main/java/org/springframework/aot/nativex/substitution/Target_Introspector.java

@@ -48,7 +48,7 @@ final class Target_Introspector {
 				} while (!c.getName().equals("java.lang.Object"));
 			}
 		}
-		catch (Exception exception) {
+		catch (Exception ignored) {
 		}
 		return null;
 	}

spring-core/src/main/java/org/springframework/cglib/proxy/BridgeMethodResolver.java

@@ -73,8 +73,7 @@ class BridgeMethodResolver {
                 } finally {
                     is.close();
                 }
-            } catch (IOException ignored) {
-			}
+            } catch (IOException ignored) {}
         }
         return resolved;
     }