[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/cast/kt15161.kt

@@ -2,6 +2,6 @@
 class Array<E>(e: E) {
     val k = Array(1) {
         1 <!USELESS_CAST!>as Any<!>
-        e <!NI;USELESS_CAST!>as Any?<!>
+        e <!USELESS_CAST{NI}!>as Any?<!>
     }
-}
+}