[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/inference/regressions/kt36342.kt

@@ -6,7 +6,7 @@ fun <K> id(arg: K): K = arg
 
 fun test() {
     id(<!UNRESOLVED_REFERENCE!>unresolved<!>)<!UNNECESSARY_NOT_NULL_ASSERTION!>!!<!>
-    <!UNRESOLVED_REFERENCE!>unresolved<!>!!<!NI;UNNECESSARY_NOT_NULL_ASSERTION!>!!<!>
+    <!UNRESOLVED_REFERENCE!>unresolved<!>!!<!UNNECESSARY_NOT_NULL_ASSERTION{NI}!>!!<!>
     try {
         id(<!UNRESOLVED_REFERENCE!>unresolved<!>)
     } catch (e: Exception) {