[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/kt2883.kt

@@ -22,7 +22,7 @@ fun test() {
     
     doAction { bar(12) }
 
-    val <!UNUSED_VARIABLE!>u<!>: Unit =  <!NI;TYPE_MISMATCH, NI;TYPE_MISMATCH, OI;TYPE_INFERENCE_EXPECTED_TYPE_MISMATCH!>bar(11)<!>
+    val <!UNUSED_VARIABLE!>u<!>: Unit =  <!TYPE_INFERENCE_EXPECTED_TYPE_MISMATCH{OI}, TYPE_MISMATCH{NI}, TYPE_MISMATCH{NI}!>bar(11)<!>
 }
 
 fun testWithoutInference(col: MutableCollection<Int>) {
@@ -30,4 +30,4 @@ fun testWithoutInference(col: MutableCollection<Int>) {
     doAction { col.add(2) }
     
     val <!UNUSED_VARIABLE!>u<!>: Unit = <!TYPE_MISMATCH!>col.add(2)<!>
-}
+}