[TD] Update diagnostics test data due to new test runners

Update includes:
- Changing syntax of `OI/`NI` tags from `<!NI;TAG!>` to `<!TAG{NI}!>`
- Fix some incorrect directives
- Change order of diagnostics in some places
- Remove ignored diagnostics from FIR test data (previously `DIAGNOSTICS` didn't work)
- Update FIR dumps in some places and add `FIR_IDENTICAL` if needed
- Replace all JAVAC_SKIP with SKIP_JAVAC directive

compiler/testData/diagnostics/tests/when/kt9972.kt

@@ -11,19 +11,19 @@
  */
 
 fun test1(): Int {
-    val x: String = if (true) <!NI;TYPE_MISMATCH!>{
+    val x: String = if (true) <!TYPE_MISMATCH{NI}!>{
         when {
-            true -> <!OI;TYPE_MISMATCH!>Any()<!>
-            else -> <!OI;NULL_FOR_NONNULL_TYPE!>null<!>
+            true -> <!TYPE_MISMATCH{OI}!>Any()<!>
+            else -> <!NULL_FOR_NONNULL_TYPE{OI}!>null<!>
         }
     }<!> else ""
     return x.hashCode()
 }
 
 fun test2(): Int {
-    val x: String = <!NI;TYPE_MISMATCH, NI;TYPE_MISMATCH!>when {
-                        true -> <!OI;TYPE_MISMATCH!>Any()<!>
+    val x: String = <!TYPE_MISMATCH{NI}, TYPE_MISMATCH{NI}!>when {
+                        true -> <!TYPE_MISMATCH{OI}!>Any()<!>
                         else -> null
                     } ?: return 0<!>
     return x.hashCode()
-}
+}