[java][switch completion] IDEA-270439 Code completion for pattern matching in switch

Adjust the completion variants for switch statements and expressions

GitOrigin-RevId: 05119897b0eb72bb875097cd197f376534d15db9

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

@@ -0,0 +1,20 @@
+
+class Main {
+  void f(Object o) {
+    switch(o) {
+      case Integer integer && integer<caret>, null
+    }
+  }
+
+  void g(Object o) {
+    switch(o) {
+      case null, Integer integer && integer<caret>
+    }
+  }
+
+  void h(Object o) {
+    switch(o) {
+      case Integer integer && integer<caret>
+    }
+  }
+}