[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/resolve/overloadConflicts/kt31670.kt

@@ -12,5 +12,5 @@ fun <T> B<T>.foo(block: (T) -> Unit) {
 }
 
 fun main() {
-    B("string").<!NI;OVERLOAD_RESOLUTION_AMBIGUITY!>foo<!> {  }
-}
+    B("string").<!OVERLOAD_RESOLUTION_AMBIGUITY{NI}!>foo<!> {  }
+}