[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/IncDec.kt

@@ -43,4 +43,4 @@ fun testUnitIncDec() {
   x = <!UNUSED_CHANGED_VALUE!>x<!INC_DEC_SHOULD_NOT_RETURN_UNIT!>--<!><!>
   x = <!INC_DEC_SHOULD_NOT_RETURN_UNIT!>++<!>x
   <!UNUSED_VALUE!>x =<!> <!INC_DEC_SHOULD_NOT_RETURN_UNIT!>--<!>x
-}
+}