[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/variance/InvariantPosition.fir.kt

@@ -44,4 +44,4 @@ interface Test<in I, out O, P> {
     var neOk33: Inv<<!SYNTAX!><!>>
     var neOk34: <!UNRESOLVED_REFERENCE!>Inv<C><!>
     var neOk35: <!WRONG_NUMBER_OF_TYPE_ARGUMENTS!>Inv<P, P><!>
-}
+}