[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/regressions/OutProjections.fir.kt

@@ -19,4 +19,4 @@ fun <T> fout(expression : T) : Out<out T> = Out<T>()
 fun fooout() : Out<Point> {
   val p = Point();
   return fout<Point>(p);
-}
+}