bump highest language level to 14, prepare to remove 13_preview

GitOrigin-RevId: ec42a9047ba63b0cbaddd8357d11ae2ed56ed6b6

java/java-tests/testData/refactoring/introduceVariable/EnsureCodeBlockForThrows.java

@@ -0,0 +1,12 @@
+
+import java.io.IOException;
+
+class MyTest {
+
+    private static void switchChain(final int i) throws IOException {
+        int g = switch (i) {
+            default -> throw new IOException(<selection>""</selection>);
+        };
+
+    }
+}