[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/multimodule/packagePrivate.txt

@@ -6,10 +6,10 @@ package p {
     public val b: kotlin.Int = 1
 }
 
-
 // -- Module: <m2> --
 package
 
 package p {
     public val c: kotlin.Int = 1
 }
+