[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/fir/analysis-tests/testData/resolveWithStdlib/j+k/JavaSyntheticProperty.fir.txt

@@ -0,0 +1,3 @@
+FILE: test.kt
+    public final val x: R|ft<@FlexibleNullability kotlin/String, kotlin/String?>!| = R|/JavaClass.JavaClass|().R|/JavaClass.foo|
+        public get(): R|ft<@FlexibleNullability kotlin/String, kotlin/String?>!|