[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/testsWithStdLib/elvisOnJavaList.fir.kt

@@ -16,4 +16,4 @@ public class P {
 fun foo(c: P): MutableList<Int> {
     // Error should be here: see KT-8168 Typechecker fails for platform collection type
     return c.getList() ?: listOf()
-}
+}