[tests] renames new switch completion test and test data

GitOrigin-RevId: 0df47babf3095049c85b7acb0feedbf5d70dc205

java/java-tests/testData/codeInsight/completion/normal/YieldInSwitchExpression_after.java

@@ -0,0 +1,8 @@
+public class ConstConfig {
+    int test(int x) {
+        return switch (x) {
+            case 1:
+                if (Math.random() > 0.5) yield <caret>
+        };
+    }
+}