[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/when/RedundantElse.fir.kt

@@ -1,3 +1,15 @@
+/*
+ * KOTLIN DIAGNOSTICS SPEC TEST (NEGATIVE)
+ *
+ * SPEC VERSION: 0.1-152
+ * PRIMARY LINKS: expressions, when-expression -> paragraph 5 -> sentence 1
+ * expressions, when-expression, exhaustive-when-expressions -> paragraph 2 -> sentence 3
+ * expressions, when-expression, exhaustive-when-expressions -> paragraph 2 -> sentence 6
+ * expressions, when-expression, exhaustive-when-expressions -> paragraph 2 -> sentence 9
+ * expressions, when-expression -> paragraph 6 -> sentence 10
+ * expressions, when-expression -> paragraph 6 -> sentence 11
+ */
+
 // FILE: MyEnum.java
 public enum MyEnum {
     SINGLE;
@@ -65,4 +77,4 @@ fun useJava(): String {
         MyEnum.SINGLE -> "OK"
         else -> "FAIL" // no warning
     }
-}
+}