[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/smartCasts/varnotnull/plusplusMinusminus.kt

@@ -12,10 +12,10 @@ operator fun Long?.inc() = this?.let { it + 1 }
 fun bar(arg: Long?): Long {
     var i = arg
     if (i++ == 5L) {
-        return i<!UNSAFE_CALL!>--<!> <!NI;DEBUG_INFO_MISSING_UNRESOLVED, OI;DEBUG_INFO_ELEMENT_WITH_ERROR_TYPE!>+<!> i
+        return i<!UNSAFE_CALL!>--<!> <!DEBUG_INFO_ELEMENT_WITH_ERROR_TYPE{OI}, DEBUG_INFO_MISSING_UNRESOLVED{NI}!>+<!> i
     }
     if (i++ == 7L) {
         return i++ <!UNSAFE_OPERATOR_CALL!>+<!> <!TYPE_MISMATCH!>i<!>
     }
     return 0L
-}
+}